Ketol-acid reductoisomerase using nadh

ABSTRACT

Methods for the evolution of NADPH specific ketol-acid reductoisomerase enzymes to acquire NADH specificity are provided. Specific mutant ketol-acid reductoisomerase enzymes isolated from  Pseudomonas  that have undergone co-factor switching to utilize NADH are described.

This application is a continuation-in-part of and claims the benefit of the U.S. Provisional Application, 61/015,346, filed Dec. 20, 2007, and U.S. Provisional Application 61/109,297, filed Oct. 29, 2008.

FIELD OF THE INVENTION

The invention relates to protein evolution. Specifically, ketol-acid reductoisomerase enzymes have been evolved to use the cofactor NADH instead of NADPH.

BACKGROUND OF THE INVENTION

Ketol-acid reductoisomerase enzymes are ubiquitous in nature and are involved in the production of valine and isoleucine, pathways that may affect the biological synthesis of isobutanol. Isobutanol is specifically produced from catabolism of L-valine as a by-product of yeast fermentation. It is a component of “fusel oil” that forms as a result of incomplete metabolism of amino acids by yeasts. After the amine group of L-valine is harvested as a nitrogen source, the resulting u-keto acid is decarboxylated and reduced to isobutanol by enzymes of the Ehrlich pathway (Dickinson, et al., J. Biol. Chem., 273: 25752-25756, 1998). Addition of exogenous L-valine to the fermentation increases the yield of isobutanol, as described by Dickinson at al., supra, wherein it is reported that a yield of isobutanol of 3 g/L is obtained by providing L-valine at a concentration of 20 g/L in the fermentation. In addition, production of n-propanol, isobutanol and isoamyl alcohol has been shown by calcium alginate immobilized cells of Zymomonas mobilis (Oaxaca, et al., Acta Biotechnol., 11: 523-532, 1991).

An increase in the yield of C3-C5 alcohols from carbohydrates was shown when amino acids leucine, isoleucine, and/or valine were added to the growth medium as the nitrogen source (WO 2005040392).

While methods described above indicate the potential of isobutanol production via biological means these methods are cost prohibitive for industrial scale isobutanol production. The biosynthesis of isobutanol directly from sugars would be economically viable and would represent an advance in the art. However, to date the only ketol-acid reductoisomerase (KARI) enzymes known are those that bind NADPH in its native form, reducing the energy efficiency of the pathway. A KARI that would bind NADH would be beneficial and enhance the productivity of the isobutanol biosynthetic pathway by capitalizing on the NADH produced by the existing glycolytic and other metabolic pathways in most commonly used microbial cells. The discovery of a KARI enzyme that can use NADH as a cofactor as opposed to NADPH would be an advance in the art.

The evolution of enzymes having specificity for the NADH cofactor as opposed to NADPH is known for some enzymes and is commonly referred to as “cofactor switching”. See for example Eppink, et al. (J. Mol. Biol., 292: 87-96, 1999), describing the switching of the cofactor specificity of strictly NADPH-dependent p-Hydroxybenzoate hydroxylase (PHBH) from Pseudomonas fluorescens by site-directed mutagenesis; and Nakanishi, et al., (J. Biol. Chem., 272: 2218-2222, 1997), describing the use of site-directed mutagenesis on a mouse lung carbonyl reductase in which Thr-38 was replaced by Asp (T38D) resulting in an enzyme having a 200-fold increase in the K_(M) values for NADP(H) and a corresponding decrease of more than 7-fold in those for NAD(H). Co-factor switching has been applied to a variety of enzymes including monooxygenases, (Kamerbeek, et al., Eur. J, Biochem., 271: 2107-2116, 2004); dehydrogenases; Nishiyama, et al., J. Biol. Chem., 268: 4656-4660, 1993; Ferredoxin-NADP reductase, Martinez-Julvez, et al., Biophys. Chem.,115: 219-224, 2005); and oxidoreductases (US2004/0248250).

Rane et al., (Arch. Biochem. Biophys., 338: 83-89, 1997) discuss cofactor switching of a ketol acid reductoisomerase isolated from E. coli by targeting four residues in the enzyme for mutagenesis, (R68, K69, K75, and R76); however the effectiveness of this method is in doubt.

Although the above cited methods suggest that it is generally possible to switch the cofactor specificity between NADH and NADPH, the methods are enzyme specific and the outcomes unpredictable. The development of a ketol-acid reductoisomerase having a high specificity for NADH with decreased specificity for NADPH would greatly enhance this enzyme's effectiveness in the isobutanol biosynthetic pathway and hence increase isobutanol production. However, no such KARI enzyme has been reported.

SUMMARY OF THE INVENTION

Applicants have solved the stated problem by identifying a number of mutant ketol-acid reductoisomerase enzymes that either have a preference for specificity for NADH as opposed to NADPH or use NADH exclusively in their reaction. The method involves mutagenesis of certain specific residues in the KARI enzyme to produce the co-factor switching.

Accordingly the invention provides A mutant ketol-acid reductoisomerase enzyme comprising the amino acid sequence as set forth in SEQ ID NO: 29; a nucleic acid molecule encoding a mutant ketol-acid reductoisomerase enzyme having the amino acid sequence as set forth in SEQ ID NO:19; a mutant ketol-acid reductoisomerase enzyme as set for in SEQ ID NO:19; a mutant ketol-acid reductoisomerase enzyme having the amino acid sequence selected from the group consisting of SEQ ID NO: 24, 25, 26, 27, 28, 67, 68, 70, 75, 79, 80, 81 and 82; and a mutant ketol-acid reductoisomerase enzyme as set forth in SEQ ID NO:17 comprising at least one mutation at a residue selected from the group consisting of 24, 33, 47, 50, 52, 53, 61, 80, 115, 156,165, and 170.

In another embodiment the invention provides a method for the evolution of an NADPH binding ketol-acid reductoisomerase enzyme to an NADH using form comprising:

-   -   a) providing a ketol-acid reductoisomerase enzyme which uses         NADPH having a specific native amino acid sequence;     -   b) identifying the cofactor switching residues in the enzyme         of (a) based on the amino acid sequence of the Pseudomonas         fluorescens ketol-acid reductoisomerase enzyme as set for the in         SEQ ID NO:17 wherein the cofactor switching residues are at         positions selected from the group consisting of: 24, 33, 47, 50,         52, 53, 61, 80, 115, 156,165, and 170: and     -   c) creating mutations in at least one of the cofactor switching         residues of (b) to create a mutant enzyme wherein said mutant         enzyme binds NADH.

In another embodiment the invention provides a method for the production of isobutanol comprising:

-   -   a) providing a recombinant microbial host cell comprising the         following genetic constructs:         -   i) at least one genetic construct encoding an acetolactate             synthase enzyme for the conversion of pyruvate to             acetolactate;         -   ii) at least one genetic construct encoding a ketol-acid             reductoisomerase enzyme of either of claims 1 or 6;         -   iii) at least one genetic construct encoding an acetohydroxy             acid dehydratase for the conversion of             2,3-dihydroxyisovalerate to α-ketoisovalerate, (pathway step             c);         -   iv) at least one genetic construct encoding a branched-chain             keto acid decarboxylase, of the conversion of             α-ketoisovalerate to isobutyraldehyde, (pathway step d);         -   v) at least one genetic construct encoding a branched-chain             alcohol dehydrogenase for the conversion of isobutyraldehyde             to isobutanol (pathway step e); and     -   b) growing the host cell of (a) under conditions where         isobutanol is produced.

In another embodiment the invention provides a method for the evolution and identification of an NADPH binding ketol-acid reductoisomerase enzyme to an NADH using form comprising:

-   -   a) providing a ketol-acid reductoisomerase enzyme which uses         NADPH having a specific native amino acid sequence;     -   b) identifying the amino acid residues in the native amino acid         sequence whose side chains are in close proximity to the         adenosyl 2′-phosphate of NADPH as mutagenesis targets;     -   c) creating a library of mutant ketol-acid reductoisomerase         enzymes from the class ketol-acid reductoisomerase enzyme of         step (a), having at least one mutation in at least one of the         mutagenesis target sites of step (b); and     -   d) screening the library of mutant ketol-acid reductoisomerase         enzymes of step (c) to identify NADH binding mutant of         ketol-acid reductoisomerase enzyme.

Alternatively the invention provides a method for evolution of an NADPH specific ketol-acid reductoisomerase enzyme to an NADH using form comprising:

-   -   a) providing a mutant enzyme having an amino acid sequence         selected from the group consisting of SEQ ID NOs: 28, 67, 68,         69, 70, and 84;     -   b) constructing a site-saturation library targeting amino acid         positions 47, 50, 52 and 53 of the mutant enzyme of (a); and     -   c) screening the site-saturation library of (b) to identify         mutants which accept NADH instead of NADPH as cofactor.

Similarly the invention provides a method for evolution of an NADPH specific ketol-acid reductoisomerase enzyme to an NADH using form comprising:

-   -   a) providing a DNA fragment encoding a mutant enzyme having an         amino acid sequence selected from the group consisting of SEQ ID         NOs: 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, and 98         containing mutations in cofactor specificity domain;     -   b) producing a DNA fragment cofactor specificity domain of (a);     -   c) providing a DNA fragment encoding a mutant enzyme having         mutations in cofactor binding affinity domain selected from the         group consisting of SEQ ID NOs: 28, 67, 68, 69, 70, 84 and 86;     -   d) incorporating mutations of step (b) into mutants of step (c);         and     -   e) screening mutants of step (d) for mutant enzymes having a         ratio of NADH/NADPH utilization is greater than one.

BRIEF DESCRIPTION OF THE FIGURES AND SEQUENCE DESCRIPTIONS

The invention can be more fully understood from the following detailed description, the Figures, and the accompanying sequence descriptions, which form part of this application.

FIGS. 1A and 1B—Show four different isobutanol biosynthetic pathways. The steps labeled “a”, “b”, “c”, “e”, “f”, “g”, “h”, “i”, “j” and “k” represent the substrate to product conversions described below.

FIGS. 2A and 2B—Multiple sequence alignment (MSA) of KARI enzymes from different recourses; FIG. 2A—MSA among three NADPH-requiring KARI enzymes; FIG. 2B—MSA among PF5-KARI and other KARI enzymes, with promiscuous nucleotide specificity, where, MMC5—is from Methanococcus maripaludis C5; MMS2—is from Methanococcus maripaludis S2; MNSB is from Methanococcus vanniellii SB; ilv5 is from Saccharomyces cerevisiae ilv5; KARI—D1—is from Sulfolobus solfataricus P2 ilvC; KARI-D2—is from Pyrobaculum aerophilum P2ilvC; and KARI S1—is from Ralstonia solanacearum GMI1000 ilvC.

FIG. 3—Interaction of phosphate binding loop with NADPH based on homology modeling.

FIG. 4—KARI activities of top performers from library C using cofactor NADH versus NADPH. Activity and standard deviation were derived from triple experiments. The mutation information is as follows:

C3A7=R47Y/S50A/T52D/V53W; C3A10=R47Y/S50A/T52G/V53W;

C3B11=R47F/S50A/T52D/V53W; C3C8=R47G/S50M/T52D/V53W; and

C4D12=R47C/S50MT52D/V53W

FIGS. 5A and 5B—FIG. 5A—Comparison of KARI activities of top performers from libraries E, F and G using cofactors NADH and NADPH. FIG. 5B—KARI activities of positive control versus wild type Pf5-ilvC using cofactors NADH. Activity and standard deviation were derived from at least three parallel experiments. “Wt” represents the wild type of Pf5-ilvC and “Neg” means negative control. Experiments for NADH and NADPH reactions in FIG. 5A were 30 min; in FIG. 5B were 10 min.

FIG. 6—Activities of top performers from library H using cofactors NADH versus NADPH. Activity and standard deviation were derived from triple experiments. Mutation information is as follows: 24F9=R47P/S50G/T52D; 68F10=R47P/T52S; 83G10=R47P/S50D/T52S; 39G4=R47P/S50C/T52D; 91A9=R47P/S50CT52D; and C3B11=R47F/S50A/T52D/V53W and Wt is wild type.

FIG. 7—Thermostability of wild type PF5-ilvC. The remaining activity of the enzyme after heating at certain temperatures for 10 min was the average number of triple experiments and normalized to the activity measured at room temperature.

FIG. 8—Multiple DNA sequence alignment among 5 naturally existing KARI molecules. The positions both bolded and boxed were identified by error prone PCR and the positions only boxed were targeted for mutagenesis.

FIGS. 9A through 9 k—Alignment of the twenty-four functionally verified KARI sequences. The GxGXX(G/A) motif involved in the binding of NAD(P)H is indicated below the alignment.

FIGS. 10A and 10B—An example of the alignment of Pseudomonas fluorescens Pf-5 KARI to the profile HMM of KARI. The eleven positions that are responsible for co-factor switching are boxed.

FIG. 11—(A) is a linear depiction of the KARI amino acid sequence with specific amino acids numbered. The cofactor specificity domain residues are shown in shaded rectangles. The cofactor binding domain is shown in dotted ovals. (Table A) shows changed amino acids, using single letter code, at numbered positions in four KARI mutants.

FIG. 12(A) is a linear depiction of the KARI amino acid sequence with specific amino acids numbered. The cofactor specificity domain residues are shown in shaded rectangles. (B) Depicts the first PCR step amplifying the mutated cofactor specificity domain residues. (C) is a linear depiction of the KARI amino acid sequence with specific amino acids of the cofactor binding domain shown in dotted ovals. (D) Depicts incorporation of the domain swapping library into the mutants containing K_(M) improving mutations. Table (E) summaries the K_(M) values for NADH for mutations resulting from combining mutations in the cofactor binding affinity domain with mutations in the cofactor specificity determining domain.

Table 9—is a table of the Profile HMM of the KARI enzymes described in Example 3. The eleven positions in the profile HMM representing the columns in the alignment which correspond to the eleven cofactor switching positions in Pseudomonas fluorescens Pf-5 KARI are identified as positions 24, 33, 47, 50, 52, 53, 61, 80, 115, 156, and 170. The lines corresponding to these positions in the model file are highlighted in yellow. Table 9 is submitted herewith electronically and is incorporated herein by reference.

The following sequences conform with 37 C.F.R. 1.821-1.825 (“Requirements for Patent Applications Containing Nucleotide Sequences and/or Amino Acid Sequence Disclosures—the Sequence Rules”) and are consistent with the World Intellectual Property Organization (WIPO) Standard ST.25 (1998) and the sequence listing requirements of the EPO and PCT (Rules 5.2 and 49.5(a-bis), and Section 208 and Annex C of the Administrative Instructions). The symbols and format used for nucleotide and amino acid sequence data comply with the rules set forth in 37 C.F.R. §1.822.

TABLE 1  Oligonucleotide Primers Used In This Invention SEQUENCE ID NO. SEQUENCE Description  1 TGATGAACATCTTCGCGTATTCGCCGTCCT Reverse Primer for pBAD vector  2 GCGTAGACGTGACTGTTGGCCTGNNTAAAGGCNN Forward primer GGCTNNCTGGGCCAAGGCT GAAGCCCACGGCTTG library C  3 GCGTAGACGTGACTGTTGGCCTGNNTAAAGGCTCG Forward primer for GCTACCGTTGCCAAGGCTGAAGCCCACGGCTTG library E  4 GCGTAGACGTGACTGTGGCCTGCGTAAAGGCNNT Forward primer for GCTACCGTTGCCAAGGCTGAAGCCCACGGCTTG library F  5 GCGTAGACGTGACTGTTGGCCTGCGTAAAGGCTCG Forward primer for GCTNNIGTTGCCAAGGCTGAAGCCCACGGCTTG library G  6 GCGTAGACGTGACTGTTGGCCTGNNTAAAGGCNNT Forward primer for GCTNNTGTTGCCAAGGCTGAAGCCCACGGCTTG library H  7 AAGATTAGCGGATCCTACCT Sequencing primer (forward)  8 AACAGCCAAGCTITTAGTTC Sequencing primer (reverse) 20 CTCTCTACTGITTCTCCATACCCG pBAD_266-021308f 21 CAAGCCGTGGGCTTCAGCCTTGGCKNN PF5_53Mt022908r 22 CGGITICAGTCTCGTCCTTGAAG pBAD_866-021308 49 GCTCAAGCANNKAACCTGAAGG pBAD-405- C33_090808f 50 CCTTCAGGTTKNNTGCTTGAGC pBAD-427- C33_090808r 51 GTAGACGTGNNKGTTGGCCTG pBAD-435- T43_090808f 52 CAGGCCAACKNNCACGTCTAC pBAD-456- T43_090808r 53 CTGAAGCCNNKGGCNNKAAAGTGAC pBAD-484- H59L61_090808f 54 GTCACTTTKNNGCCKNNGGCTTCAG pBAD-509- H59L61_090808r 55 GCAGCCGTTNNKGGTGCCGACT pBAD-519- A71_990808f 56 AGTCGGCACCKNNAACGGCTGC pBAD-541- A71_090808r 57 CATGATCCTGNNKCCGGACGAG pBAD-545- T80_090808f 58 CTCGTCCGGKNNCAGGATCATG pBAD-567- T80_090808r 59 CAAGAAGGGCNNKACTCTGGCCT pBAD-608- A101_090808f 60 AGGCCAGAGTKNNGCCCTTCTTG pBAD-631- A101_090808r 61 GTTGTGCCTNNKGCCGACCTCG pBAD-663- R119_090808f 62 CGAGGTCGGCKNNAGGCACAAC pBAD-685- R119_090808r 71 GTAGACGTGACTGTTGGCCTGNNKNAAAGGCNNKGC PF5_4Mt111008.f TNNKNNKGCCAAGGCTGAAGCCCACGG 72 CCGTGGGCTTCAGCCTTGGCKNNKNNAGCKNNGC  PF5_4Mt111008.r CTTTKNNCAGGCCAACAGTCACGTCTAC 73 AAGATTAGCGGATCCTACCT pBAD_230.f 74 GAGTGGCGCCCTTCTTGATGTTCG pBAD_601_021308r

Additional sequences used in the application are listed below. The abbreviated gene names in bracket are used in this disclosure.

-   SEQ ID NO: 9-Methanococcus maripaludis C5-ilvC (MMC5)—GenBank     Accession Number NC_(—)009135.1 Region: 901034..902026 -   SEQ ID NO: 10 is the Methanococcus maripaludis S2-ilvC     (MMS2)—GenBank Accession Number NC_(—)005791.1 Region:     645729..646721 -   SEQ ID NO: 11 is the Methanococcus vannielli SB-ilv5 (MVSB)—GenBank     Accession Number NZ_AAWX01000002.1 Region: 302214..303206 -   SEQ ID NO: 12 is the Saccharomyces cerevisiae ilv5 (ilv5)—GenBank     Accession Number NC_(—)001144.4 Region: 838065..839252 -   SEQ ID NO: 13 is the Sulfolobus solfataricus P2 ilvC     (KARI-D1)—GenBank Accession Number NC_(—)002754.1 Region:     506253..507260 -   SEQ ID NO: 14 is the Pyrobaculum aerophilum str. IM2 ilvC     (KARI-D2)—GenBank Accession Number NC_(—)003364.1 Region:     1976281..1977267 -   SEQ ID NO: 15 is the Ralstonia solanacearum GMI1000 ilvC     (KARI-S1)—GenBank Accession Number NC_(—)003295.1 Region:     2248264..2249280 -   SEQ ID NO: 16 is the Pseudomonas aeruginosa PAO1 ilvC—GenBank     Accession Number NC_(—)002516 Region: 5272455..5273471 -   SEQ ID NO: 17 is the Pseudomonas fluorescens PF5 ilvC—GenBank     Accession Number NC_(—)004129 Region: 6017379..6018395 -   SEQ ID NO: 18 is the Spinacia oleracea ilvC (Spinach-KARI)—GenBank     Accession Number NC_(—)002516 Region: 1..2050 -   SEQ ID NO: 19 is the amino acid sequence of the mutant     (Y24F/R47Y/S50A/T52D/V53A/L61F/G170A) of the ilvC native protein of     Pseudomonas fluorescens -   SEQ ID NO: 23 is the DNA SEQ of the mutant     (Y24F/R47Y/S50A/T52D/V53A/L61F/G170A) of the ilvC native protein of     Pseudomonas fluorescens -   SEQ ID NO: 24 is the amino acid SEQ of the mutant ZB1     (Y24F/R47Y/S50A/T52D/V53A/L61F/A156V) -   SEQ ID NO: 25 is the amino acid SEQ of the mutant ZF3     (Y24F/C33L/R47Y/S50A/T52D/V53A/L61F) -   SEQ ID NO: 26 is the amino acid SEQ of the mutant ZF2     (Y24F/C33L/R47Y/S50A/T52D/V53A/L61F/A156V) -   SEQ ID NO: 27 is the amino acid SEQ of the mutant ZB3     (Y24F/C33L/R47Y/S50A/T52D/V53A/L61F/G170A) -   SEQ ID NO: 28 is the amino acid SEQ of the mutant Z4B8     (C33L/R47Y/S50A/T52D/V53A/L61F/T80I/A156V/G170A) -   SEQ ID NO: 29 is a consensus amino acid sequence comprising all     experimentally verified KARI point mutations as based on SEQ ID     NO:17 -   SEQ ID NO: 30 is the amino acid sequence for KARI from Natronomonas     pharaonis DSM 2160 -   SEQ ID NO: 31 is the amino acid sequence for KARI from Bacillus     subtilis subsp. subtilis str. 168 -   SEQ ID NO: 32 is the amino acid sequence for KARI from     Corynebacterium glutamicum ATCC13032 -   SEQ ID NO: 33 is the amino acid sequence for KARI from Phaeospirilum     molischianum -   SEQ ID NO: 34 is the amino acid sequence for KARI from Zymomonas     mobilis subsp. mobilis ZM4 -   SEQ ID NO: 35 is the amino acid sequence for KARI Alkalilimnicola     ehrlichei MLHE-1 -   SEQ ID NO: 36 is the amino acid sequence for KARI from Campylobacter     lari RM2100 -   SEQ ID NO: 37 is the amino acid sequence for KARI from Marinobacter     aquaeolei VT8 -   SEQ ID NO: 38 is the amino acid sequence for KARI Psychrobacter     arcticus 273-4 -   SEQ ID NO: 39 is the amino acid sequence for KARI from Hahella     chejuensis KCTC2396 -   SEQ ID NO: 40 is the amino acid sequence for KARI from Thiobacillus     denitrificans ATCC25259 -   SEQ ID NO: 41 is the amino acid sequence for KARI from Azotobacter     vinelandii AvOP -   SEQ ID NO: 42 is the amino acid sequence for KARI from Pseudomonas     syringae pv. syringae B728a -   SEQ ID NO: 43 is the amino acid sequence for KARI from Pseudomonas     syringae pv. tomato str. DC3000 -   SEQ ID NO: 44 is the amino acid sequence for KARI from Pseudomonas     putida KT2440 -   SEQ ID NO: 45 is the amino acid sequence for KARI from Pseudomonas     entomophila L48 -   SEQ ID NO: 46 is the amino acid sequence for KARI from Pseudomonas     mendocina ymp -   SEQ ID NO: 47 is the amino acid sequence for KARI from Bacillus     cereus ATCC10987 NP_(—)977840.1 -   SEQ ID NO: 48 is the amino acid sequence for KARI from Bacillus     cereus ATCC10987 NP_(—)978252.1 -   SEQ ID NO: 63 is the amino acid sequence for KARI from Escherichia     coli—GenBank Accession Number P05793 -   SEQ ID NO: 64 is the amino acid sequence for KARI from Marine Gamma     Proteobacterium HTCC2207—GenBank Accession Number ZP_(—)01224863.1 -   SEQ ID NO: 65 is the amino acid sequence for KARI from     Desulfuromonas acetoxidans—GenBank Accession Number ZP_(—)01313517.1 -   SEQ ID NO: 66 is the amino acid sequence for KARI from Pisum sativum     (Pea)—GenBank Accession Number O82043 -   SEQ ID NO: 67 is the amino acid sequence for mutant 3361G8     (C33L/R47Y/S50A/T52D/V53A/L61F/T80I) -   SEQ ID NO: 68 is the amino acid sequence for mutant 2H10     (Y24F/C33L/R47Y/S50A/T52D/V53I/L61F/T80I/A156V) -   SEQ ID NO: 69 is the amino acid sequence for mutant 1D2     (Y24F/R47Y/S50A/T52D/V53A/L61F/T80I/A156V. -   SEQ ID NO: 70 is the amino acid sequence for mutant 3F12     (Y24F/C33L/R47Y/S50A/T52D/V53A/L61F/T80I/A156V). -   SEQ ID NO: 75 is the amino acid sequence for mutant JB1C6     (Y24F/C33L/R47H/S50D/T52Y/V53Y/L61F/T80I/A156V) -   SEQ ID NO: 76 is the amino acid sequence for mutant 16445E4     (C33L/R47P/S50V/T52D/V53G/L61F/T80I/A156V) -   SEQ ID NO: 77 is the amino acid sequence for mutant 16468D7     (Y24F/C33L/R47T/S50I/T52D/V53R/L61F/T80I/A156V) -   SEQ ID NO: 78 is the amino acid sequence for mutant 16469F3     (C33L/R47E/S50A/T52D/V53A/L61F/T80I) -   SEQ ID NO: 79 is the amino acid sequence for mutant JEA1     (Y24F/C33L/R47P/S50F/T52D/L61F/T80I/A156V) -   SEQ ID NO: 80 is the amino acid sequence for mutant JEG2     (Y24F/C33L/R47F/S50A/T52D/V53A/L61F/T80I/A156V) -   SEQ ID NO: 81 is the amino acid sequence for mutant JEG4     (Y24F/C33L/R47N/S50N/T52D/V53A/L61F/T80I/A156V) -   SEQ ID NO: 82 is the amino acid sequence for mutant JEA7     (Y24F/C33L/R47P/S50N/T52D/V53A/L61F/T80I/A156V) -   SEQ ID NO: 83 is the amino acid sequence for mutant JED1     (C33L/R47N/S50N/T52D/V53A/L61F/T80I/A156V) -   SEQ ID NO: 84 is the amino acid sequence for mutant 3361E1 -   SEQ ID NO: 85 is the amino acid sequence for mutant C2F6 -   SEQ ID NO: 86 is the amino acid sequence for mutant C3B11 -   SEQ ID NO: 87 is the amino acid sequence for mutant C4D12 -   SEQ ID NO: 88 is the amino acid sequence for mutant SE1 -   SEQ ID NO: 89 is the amino acid sequence for mutant SE2 -   SEQ ID NO: 90 is the amino acid sequence for mutant SB3 -   SEQ ID NO: 91 is the amino acid sequence for mutant SD3 -   SEQ ID NO: 92 is the amino acid sequence for mutant 9650E5 -   SEQ ID NO: 93 is the amino acid sequence for mutant 9667A11 -   SEQ ID NO: 94 is the amino acid sequence for mutant 9862B9 -   SEQ ID NO: 95 is the amino acid sequence for mutant 9875B9 -   SEQ ID NO: 96 is the amino acid sequence for mutant 11461D8 -   SEQ ID NO: 97 is the amino acid sequence for mutant 11463 -   SEQ ID NO: 98 is the amino acid sequence for mutant 11518B4

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to the generation of mutated KARI enzymes to use NADH as opposed to NADPH. Such co-factor switched enzymes function more effectively in microbial systems designed to produce isobutanol. Isobutanol is an important industrial commodity chemical with a variety of applications, where its potential as a fuel or fuel additive is particularly significant. Although only a four-carbon alcohol, butanol has the energy content similar to that of gasoline and can be blended with any fossil fuel. Isobutanol is favored as a fuel or fuel additive as it yields only CO₂ and little or no SO_(X) or NO_(X) when burned in the standard internal combustion engine. Additionally butanol is less corrosive than ethanol, the most preferred fuel additive to date.

The following definitions and abbreviations are to be use for the interpretation of the claims and the specification.

The term “invention” or “present invention” as used herein is meant to apply generally to all embodiments of the invention as described in the claims as presented or as later amended and supplemented, or in the specification.

The term “isobutanol biosynthetic pathway” refers to the enzymatic pathway to produce isobutanol. Preferred isobutanol biosynthetic pathways are illustrated in FIG. 1 and described herein.

The term “NADPH consumption assay” refers to an enzyme assay for the determination of the specific activity of the KARI enzyme, involving measuring the disappearance of the KARI cofactor, NADPH, from the enzyme reaction.

“KARI” is the abbreviation for the enzyme ketol-acid reducto-isomerase.

The term “close proximity” when referring to the position of various amino acid residues of a KARI enzyme with respect to the adenosyl 2’-phosphate of NADPH means amino acids in the three-dimensional model for the structure of the enzyme that are within about 4.5 Å of the phosphorus atom of the adenosyl 2′-phosphate of NADPH bound to the enzyme.

The term “ketol-acid reductoisomerase” (abbreviated “KARI”), and “acetohydroxy acid isomeroreductase” will be used interchangeably and refer to the enzyme having the EC number, EC 1.1.1.86 (Enzyme Nomenclature 1992, Academic Press, San Diego). Ketol-acid reductoisomerase catalyzes the reaction of (S)-acetolactate to 2,3-dihydroxyisovalerate, as more fully described below. These enzymes are available from a number of sources, including, but not limited to E. coli GenBank Accession Number NC-000913 REGION: 3955993..3957468, Vibrio cholerae GenBank Accession Number NC-002505 REGION: 157441..158925, Pseudomonas aeruginosa, GenBank Accession Number NC-002516, (SEQ ID NO: 16) REGION: 5272455..5273471, and Pseudomonas fluorescens GenBank Accession Number NC-004129 (SEQ ID NO: 17) REGION: 6017379..6018395. As used herein the term “Class ketol-acid reductoisomerase enzyme” means the short form that typically has between 330 and 340 amino acid residues, and is distinct from the long form, called class H, that typically has approximately 490 residues.

The term “acetolactate synthase” refers to an enzyme that catalyzes the conversion of pyruvate to acetolactate and CO₂. Acetolactate has two stereoisomers ((R) and (S)); the enzyme prefers the (S)-isomer, which is made by biological systems. Preferred acetolactate synthases are known by the EC number 2.2.1.6 9 (Enzyme Nomenclature 1992, Academic Press, San Diego). These enzymes are available from a number of sources, including, but not limited to, Bacillus subtilis (GenBank Nos: CAB15618, Z99122, NCBI (National Center for Biotechnology Information) amino acid sequence, NCBI nucleotide sequence, respectively), Klebsiella pneumoniae (GenBank Nos: AAA25079, M73842 and Lactococcus lactis (GenBank Nos: AAA25161, L16975).

The term “acetohydroxy acid dehydratase” refers to an enzyme that catalyzes the conversion of 2,3-dihydroxyisovalerate to α-ketoiso-valerate. Preferred acetohydroxy acid dehydratases are known by the EC number 4.2.1.9. These enzymes are available from a vast array of microorganisms, including, but not limited to, E. coli (GenBank Nos: YP_(—)026248, NC_(—)000913, S. cerevisiae (GenBank Nos: NP_(—)012550, NC_(—)001142), M. maripaludis (GenBank Nos: CAF29874, BX957219), and B. subtilis (GenBank Nos: CAB14105, Z99115).

The term “branched-chain α-keto acid decarboxylase” refers to an enzyme that catalyzes the conversion of α-ketoisovalerate to isobutyraldehyde and CO₂. Preferred branched-chain i-keto acid decarboxylases are known by the EC number 4.1.1.72 and are available from a number of sources, including, but not limited to, Lactococcus lactis (GenBank Nos: AAS49166, AY548760; CAG34226, AJ746364, Salmonella typhimurium (GenBank Nos: NP-461346, NC-003197), and Clostridium acetobutylicum (GenBank Nos: NP-149189, NC-001988).

The term “branched-chain alcohol dehydrogenase” refers to an enzyme that catalyzes the conversion of isobutyraldehyde to isobutanol. Preferred branched-chain alcohol dehydrogenases are known by the EC number 1.1.1.265, but may also be classified under other alcohol dehydrogenases (specifically, EC 1.1.1.1 or 1.1.1.2). These enzymes utilize NADH (reduced nicotinamide adenine dinucleotide) and/or NADPH as electron donor and are available from a number of sources, including, but not limited to, S. cerevisiae (GenBank Nos: NP-010656, NC-001136; NP-014051, NC-001145), E. coli (GenBank Nos: NP-417484, and C. acetobutylicum (GenBank Nos: NP-349892, NC_(—)003030).

The term “branched-chain keto acid dehydrogenase” refers to an enzyme that catalyzes the conversion of α-ketoisovalerate to isobutyryl-CoA (isobutyryl-cofactor A), using NAD (nicotinamide adenine dinucleotide) as electron acceptor. Preferred branched-chain keto acid dehydrogenases are known by the EC number 1.2.4.4. These branched-chain keto acid dehydrogenases comprise four subunits, and sequences from all subunits are available from a vast array of microorganisms, including, but not limited to, B. subtilis (GenBank Nos: CAB14336, Z99116; CAB14335, Z99116; CAB14334, Z99116; and CAB14337, Z99116) and Pseudomonas putida (GenBank Nos: AAA65614, M57613; AAA65615, M57613; AAA65617, M57613; and AAA65618, M57613).

The terms “k_(cat)” and “K_(M)” are known to those skilled in the art and are described in Enzyme Structure and Mechanism, 2^(nd) ed. (Ferst; W.H. Freeman Press, NY, 1985; pp 98-120). The term “k_(cat)”, often called the “turnover number”, is defined as the maximum number of substrate molecules converted to products per active site per unit time, or the number of times the enzyme turns over per unit time. K_(cat)=Vmax/[E], where [E] is the enzyme concentration (Ferst, supra). The terms “total turnover” and “total turnover number” are used herein to refer to the amount of product formed by the reaction of a KARI enzyme with substrate.

The term “catalytic efficiency” is defined as the K_(cat)/K_(M) of an enzyme. Catalytic efficiency is used to quantify the specificity of an enzyme for a substrate

The term “isolated nucleic acid molecule”, “isolated nucleic acid fragment” and “genetic construct” will be used interchangeably and will mean a polymer of RNA or DNA that is single- or double-stranded, optionally containing synthetic, non-natural or altered nucleotide bases. An isolated nucleic acid fragment in the form of a polymer of DNA may be comprised of one or more segments of cDNA, genomic DNA or synthetic DNA.

The term “amino acid” refers to the basic chemical structural unit of a protein or polypeptide. The following abbreviations are used herein to identify specific amino acids:

Three-Letter One-Letter Amino Acid Abbreviation Abbreviation Alanine Ala A Arginine Arg R Asparagine Asn N Aspartic acid Asp D Cysteine Cys C Glutamine Gln Q Glutamic acid Glu E Glycine Gly G Histidine His H Leucine Leu L Lysine Lys K Methionine Met M Phenylalanine Phe F Proline Pro P Serine Ser S Threonine Thr T Tryptophan Trp W Tyrosine Tyr Y Valine Val V

The term “gene” refers to a nucleic acid fragment that is capable of being expressed as a specific protein, optionally including regulatory sequences preceding (5′ non-coding sequences) and following (3′ non-coding sequences) the coding sequence. “Native gene” refers to a gene as found in nature with its own regulatory sequences. “Chimeric gene” refers to any gene that is not a native gene, comprising regulatory and coding sequences that are not found together in nature. Accordingly, a chimeric gene may comprise regulatory sequences and coding sequences that are derived from different sources, or regulatory sequences and coding sequences derived from the same source, but arranged in a manner different than that found in nature. “Endogenous gene” refers to a native gene in its natural location in the genome of a microorganism. A “foreign” gene refers to a gene not normally found in the host microorganism, but that is introduced into the host microorganism by gene transfer. Foreign genes can comprise native genes inserted into a non-native microorganism, or chimeric genes. A “transgene” is a gene that has been introduced into the genome by a transformation procedure.

As used herein the term “coding sequence” refers to a DNA sequence that encodes for a specific amino acid sequence. “Suitable regulatory sequences” refer to nucleotide sequences located upstream (5′ non-coding sequences), within, or downstream (3′ non-coding sequences) of a coding sequence, and which influence the transcription, RNA processing or stability, or translation of the associated coding sequence. Regulatory sequences may include promoters, translation leader sequences, introns, polyadenylation recognition sequences, RNA processing site, effector binding site and stem-loop structure.

The term “promoter” refers to a DNA sequence capable of controlling the expression of a coding sequence or functional RNA. In general, a coding sequence is located 3′ to a promoter sequence. Promoters may be derived in their entirety from a native gene, or be composed of different elements derived from different promoters found in nature, or even comprise synthetic DNA segments. It is understood by those skilled in the art that different promoters may direct the expression of a gene in different tissues or cell types, or at different stages of development, or in response to different environmental or physiological conditions. Promoters which cause a gene to be expressed in most cell types at most times are commonly referred to as “constitutive promoters”. It is further recognized that since in most cases the exact boundaries of regulatory sequences have not been completely defined, DNA fragments of different lengths may have identical promoter activity.

The term “operably linked” refers to the association of nucleic acid sequences on a single nucleic acid fragment so that the function of one is affected by the other. For example, a promoter is operably linked with a coding sequence when it is capable of effecting the expression of that coding sequence (i.e., that the coding sequence is under the transcriptional control of the promoter). Coding sequences can be operably linked to regulatory sequences in sense or antisense orientation,

The term “expression”, as used herein, refers to the transcription and stable accumulation of sense (mRNA) or antisense RNA derived from the nucleic acid fragment of the invention. Expression may also refer to translation of mRNA into a polypeptide.

As used herein the term “transformation” refers to the transfer of a nucleic acid fragment into the genome of a host microorganism, resulting in genetically stable inheritance. Host microorganisms containing the transformed nucleic acid fragments are referred to as “transgenic” or “recombinant” or “transformed” microorganisms.

The terms “plasmid”, “vector” and “cassette” refer to an extra chromosomal element often carrying genes which are not part of the central metabolism of the cell, and usually in the form of circular double-stranded DNA fragments. Such elements may be autonomously replicating sequences, genome integrating sequences, phage or nucleotide sequences, linear or circular, of a single- or double-stranded DNA or RNA, derived from any source, in which a number of nucleotide sequences have been joined or recombined into a unique construction which is capable of introducing a promoter fragment and DNA sequence for a selected gene product along with appropriate 3′ untranslated sequence into a cell. “Transformation cassette” refers to a specific vector containing a foreign gene and having elements in addition to the foreign gene that facilitates transformation of a particular host cell. “Expression cassette” refers to a specific vector containing a foreign gene and having elements in addition to the foreign gene that allow for enhanced expression of that gene in a foreign host.

The term “site-saturation library” refers to a library which contains random substitutions at a specific amino acid position with all 20 possible amino acids at once.

The term “error-prone PCR” refers to adding random copying errors by imposing imperfect or ‘sloppy’ PCR reaction conditions which generate randomized libraries of mutations in a specific nucleotide sequence.

As used herein the term “codon degeneracy” refers to the nature in the genetic code permitting variation of the nucleotide sequence without affecting the amino acid sequence of an encoded polypeptide. The skilled artisan is well aware of the “codon-bias” exhibited by a specific host cell in usage of nucleotide codons to specify a given amino acid. Therefore, when synthesizing a gene for improved expression in a host cell, it is desirable to design the gene such that its frequency of codon usage approaches the frequency of preferred codon usage of the host cell.

The term “codon-optimized” as it refers to genes or coding regions of nucleic acid molecules for transformation of various hosts, refers to the alteration of codons in the gene or coding regions of the nucleic acid molecules to reflect the typical codon usage of the host microorganism without altering the polypeptide encoded by the DNA.

Molecular Techniques

Standard recombinant DNA and molecular cloning techniques used here are well known in the art and are described by Sambrook et al. (Sambrook, Fritsch and Maniatis, Molecular Cloning: A Laboratory Manual, Second Edition, Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N.Y., 1989) (hereinafter “Maniatis”); and by Silhavy et al. (Experiments with Gene Fusions, Cold Spring Harbor Laboratory Press Cold Spring Harbor, N.Y., 1984); and by Ausubel, F. M. at al., (Current Protocols in Molecular Biology, published by Greene Publishing Assoc. and Wiley-Interscience, 1987).

The present invention addresses a need that arises in the microbial production of isobutanol where the ketol-acid reductoisomerase enzyme performs a vital role. Wild type ketol-acid reductoisomerase enzymes typically use NADPH as their cofactor. However, in the formation of isobutanol an excess of NADH is produced by ancillary metabolic pathways. The invention provides mutant Class I KARI enzymes that have been evolved to utilize NADH as a cofactor, overcoming the cofactor problem and increasing the efficiency of the isobutanol biosynthetic pathway.

Production of isobutanol utilizes the glycolysis pathway present in the host microorganism. During the production of two molecules of pyruvate from glucose during glycolysis, there is net production of two molecules of NADH from NAD⁺ by the glyceraldehyde-3-phosphate dehydrogenase reaction. During the further production of one molecule of isobutanol from two molecules of pyruvate, there is net consumption of one molecule of NADPH, by the KARI reaction, and one molecule of NADH by the isobutanol dehydrogenase reaction. The overall reaction of glucose to isobutanol thus leads to net production of one molecule of NADH and net consumption of one molecule of NADPH. The interconversion of NADH with NADPH is generally slow and inefficient; thus, the NADPH consumed is generated by metabolism (for example, by the pentose phosphate pathway) consuming substrate in the process. Meanwhile, the cell strives to maintain homeostasis in the NAD⁺/NADH ratio, leading to the excess NADH produced in isobutanol production being consumed in wasteful reduction of other metabolic intermediates; e.g., by the production of lactate from pyruvate. Thus, the imbalance between NADH produced and NADPH consumed by the isobutanol pathway leads to a reduction in the molar yield of isobutanol produced from glucose in two ways: 1) unnecessary operation of metabolism to produce NADPH, and 2) wasteful reaction of metabolic intermediates to maintain NAD⁺/NADH homeostasis. The solution to this problem is to invent a KARI that is specific for NADH as its cofactor, so that both molecules of NADH produced in glycolysis are consumed in the synthesis of isobutanol from pyruvate.

Keto Acid Reductoisomerase (KARI) Enzymes

Acetohydroxy acid isomeroreductase or ketol-acid reducto-isomerase (KARI; EC 1.1.1.86) catalyzes two steps in the biosynthesis of branched-chain amino acids and is a key enzyme in their biosynthesis. KARI is found in a variety of microorganisms and amino acid sequence comparisons across species have revealed that there are 2 types of this enzyme: a short form (class I) found in fungi and most bacteria, and a long form (class II) typical of plants.

Class I KARIs typically have between 330-340 amino acid residues. The long form KARI enzymes have about 490 amino acid residues. However, some bacteria such as Escherichia coli possess a long form, where the amino acid sequence differs appreciably from that found in plants. KARI is encoded by the ilvC gene and is an essential enzyme for growth of E. coli and other bacteria in a minimal medium. Typically KARI uses NADPH as cofactor and requires a divalent cation such as Mg⁺⁺ for its activity. In addition to utilizing acetolactate in the valine pathway, KARI also converts acetohydroxybutanoate to dihydroxymethylpentanoate in the isoleucine production pathway.

Class II KARIs generally consist of a 225-residue N-terminal domain and a 287-residue C-terminal domain. The N-terminal domain, which contains the NADPH-binding site, has an α/β structure and resembles domains found in other pyridine nucleotide-dependent oxidoreductases. The C-terminal domain consists almost entirely of α-helices and is of a previously unknown topology.

The crystal structure of the E. coli KARI enzyme at 2.6 Å resolution has been solved (Tyagi, et al., Protein Sci., 14: 3089-3100, 2005). This enzyme consists of two domains, one with mixed α/β structure which is similar to that found in other pyridine nucleotide-dependent dehydrogenases. The second domain is mainly α-helical and shows strong evidence of internal duplication. Comparison of the active sites of KARI of E. coli, Pseudomonas aeruginosa, and spinach showed that most residues in the active site of the enzyme occupy conserved positions. While the E. coli KARI was crystallized as a tetramer, which is probably the likely biologically active unit, the P. aeruginosa KARI (Ahn, et al., J. Mol. Biol., 328: 505-515, 2003) formed a dodecamer, and the enzyme from spinach formed a dimer. Known KARIs are slow enzymes with a reported turnover number (k_(cat)) of 2 s⁻¹ (Aulabaugh et al.: Biochemistry, 29: 2824-2830, 1990) or 0.12 s⁻¹ (Rane at al., Arch. Biochem, Biophys. 338: 83-89, 1997) for acetolactate. Studies have shown that genetic control of isoleucine-valine biosynthesis in E. coli is different than that in Ps. aeruginosa (Marinus, et al., Genetics, 63: 547-56, 1969).

Identification of Amino Acid Target Sites for Cofactor Switching

It was reported that phosphate p2′ oxygen atoms of NADPH form hydrogen bonds with side chains of Arg162, Ser165 and Ser167 of spinach KARI (Biou V., et al, The EMBO Journal, 16: 3405-3415, 1997). Multiple sequence alignments were performed, using vector NTI (Invitrogen Corp. Carlsbad, Calif.), with KARI enzymes from spinach, Pseudomonas aeruginosa (PAO-KARI) and Pseudomonas fluorescens (PF5-KARI). The NADPH binding sites are shown in FIG. 2A. The amino acids, arginine, threonine and serine appear to play similar roles in forming hydrogen bonds with phosphate p2′ oxygen atoms of NADPH in KARI enzymes. Studies by Ahn et al., (J. Mol. Biol., 328: 505-515, 2003) had identified three NADPH phosphate binding sites (Arg47, Ser50 and Thr52) for Pseudomonas aeruginosa (PAO-KARI) following comparing its structure with that of the spinach KARI. Hypothesizing that these three NADPH phosphate binding sites of the three KARI enzymes used in the disclosure were conserved, Arg47, Ser50 and Thr52 of PF5-KARI were targeted as the phosphate binding sites for this enzyme. This hypothesis was further confirmed through homology modeling.

Multiple sequence alignment among PF5-ilvC and several other KARI enzymes with promiscuous nucleotide specificity was also performed. As shown in FIG. 23, the amino acids of glycine (G50) and tryptophan (W53), in other KARI enzymes in FIG. 23, always appear together as a pair in the sequences of those enzymes. It was therefore assumed that the tryptophan 53 bulky residue was important in determining nucleotide specificity and by reducing the size of nucleotide binding pocket one could favor binding of the smaller nucleotide, NADH. Position 53 of PF5-ilvC was therefore chosen as a target for mutagenesis.

Several site-saturation gene libraries were prepared containing genes encoding KARI enzymes by commercially available kits for the generation of mutants. Clones from each library were screened for improved KARI activity using the NADH consumption assay described herein. Screening resulted in the identification of a number of genes having mutations that can be correlated to KARI activity. The location of the mutations were identified using the amino acid sequence of the Pseudomonas fluorescens PF5 ilvC protein (SEQ ID NO:17). Mutants with improved KARI activity had mutations at one or more positions at amino acids: 24, 33, 47, 50, 52, 53, 61, 80, 115, 156, 165, and 170. More specifically desirable mutations included the following substitutions:

-   -   a) the residue at position 47 has an amino acid substitution         selected from the group consisting of A, C, D, F, G, I, L, N, P,         and Y;     -   b) the residue at position 50 has an amino acid substitution         selected from the group consisting of A, C, D, E, F, G, M, N, V,         W;     -   c) the residue at position 52 has an amino acid substitution         selected from the group consisting of A, C, D, G, H, N, S;     -   d) the residue at position 53 has an amino acid substitution         selected from the group consisting of A, H, I, W;

In another embodiment, additional mutagenesis, using error prone PCR, performed on the mutants listed above identified suitable mutation positions as: 156, 165, 61, 170, 115 and 24. More specifically the desirable mutants with lower K_(M) for NADH contained the following substitutions:

-   -   e) the residue at position 156 has an amino acid substitution of         V;     -   f) the residue at position 165 has an amino acid substitution of         M;     -   g) the residue at position 61 has an amino acid substitution of         F;     -   h) the residue at position 170 has an amino acid substitution of         A;     -   i) the residue at position 24 has an amino acid substitution of         F; and     -   j) the residue at position 115 has an amino acid substitution of         L.

In another embodiment, multiple sequence alignment of Pseudomonas fluorescens PF5-ilvC and Bacillus cereus ilvC1 and ilvC2 and spinach KARI was performed which allowed identification of positions 24, 33, 47, 50, 52, 53, 61, 80, 156 and 170 for further mutagenesis. More specifically mutants with much lower K_(M) for NADH were obtained. These mutations are also based on the Pseudomonas fluorescens, KARI enzyme (SEQ ID NO:17) as a reference sequence wherein the reference sequence comprises at least one amino acid substitution selected from the group consisting of:

-   -   k) the residue at position 24 has an amino acid substitution of         phenylalanine;     -   l) the residue at position 50 has an amino acid substitution of         alanine;     -   m) the residue at position 52 has an amino acid substitution of         aspartic acid;     -   n) the residue at position 53 has an amino acid substitution of         alanine;     -   o) the residue at position 61 has an amino acid substitution of         phenylalanine;     -   p) the residue at position 156 has an amino acid substitution of         valine;     -   q) the residue at position 33 has an amino acid substitution of         leucine;     -   r) the residue at position 47 has an amino acid substitution of         tyrosine;     -   s) the residue at position 80 has an amino acid substitution of         isoleucine; and     -   t) the residue at position 170 has an amino acid substitution of         alanine.

The present invention includes a mutant polypeptide having KARI activity, said polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO; 24, 25, 26, 27 and 28.

A consensus sequence for the mutant ilvC was generated from the multiple sequence alignment and is provided as SEQ ID NO: 29 which represents all experimentally verified mutations of the KARI enzyme based on the amino acid sequence of the KARI enzyme isolated from Pseudomonas fluorescens, (SEQ ID NO:17)

Additionally the present invention describes mutation positions identified using a profile Hidden Markov Model (HMM) built based on sequences of 25 functionally verified Class I and Class II KARI enzymes. Profile HMM identified mutation positions 24, 33, 47, 50, 52, 53, 61, 80, 115, 156, and 170 (the numbering is based on the sequences of Pseudomonas fluorescens PF5 KARI). Thus, it will be appreciated by the skilled person that mutations at these positions, as well as those discussed above that have been experimentally verified will also give rise to KARI enzymes having the ability to bind NADH.

Furthermore, applicants have discovered that the ketol-acid reductoisomerase enzyme has two functionally related domains: one domain affecting nucleotide specificity and the other domain impacting the K_(M) for the cofactor (FIGS. 11 and 12). To examine whether this characteristic could be exploited to engineer the desired KARI mutants (i.e., mutants with high NADH activity (K_(M)<20 μM) and substantially decreased NADPH activity (K_(M)>100 μM)), two libraries were created.

One library was a four-site saturation library targeting the NADH or NADPH binding positions, i.e., amino acids at positions 47, 50, 52 and 53 (FIG. 11). To build this library, mutants which possessed both NADH and NADPH activities and K_(M)˜10-20 μM for NADH, were selected from a group consisting of SEQ ID NOs: 28, 67, 68, 69, 70 and 84, as templates. Further saturation mutagenesis generated new mutants (i.e., mutants with SEQ ID NOs: 75-78) that possessed mainly NADH activity with very low NADPH activity.

The desirable mutants with higher NADH activity, following site saturation mutagenesis, comprised the following substitutions:

-   -   u) the residue at position 24 has an amino acid substitution of         phenylalanine;     -   v) the residue at position 50 has an amino acid substitution of         aspartic acid or valine or isoleucine or phenylalanine;     -   w) the residue at position 52 has an amino acid substitution of         tyrosine or aspartic acid;     -   x) the residue at position 53 has an amino acid substitution of         tyrosine or glycine, or arginine, or alanine;     -   y) the residue at position 61 has an amino acid substitution of         phenylalanine;     -   z) the residue at position 156 has an amino acid substitution of         valine;     -   aa) the residue at position 33 has an amino acid substitution of         leucine;     -   bb) the residue at position 47 has an amino acid substitution of         histidine, or proline, or threonine, or glutamic acid; and     -   cc) the residue at position 80 has an amino acid substitution of         isoleucine.

The K_(M) for NADH in the above mutants was still slightly high (e.g., JB1C6, SEQ ID NO; 74, has K_(M) of 22 μM for NADH). To further improve the NADH K_(M) of the mutant KARIs, a “domain swapping library”, which combined the nucleotide switching mutations and mutations with improved K_(M) for NADH, was created (FIG. 12). More specifically, the beneficial mutations at positions 47, 50, 52 and 53 obtained in the site saturation experiment (see Tables 3 and 4), were transferred into mutants that possessed K_(M)˜4-40 μM for NADH (SEQ ID NOs:24-28 and 67-70 and 84, see Tables 6 and 7). The resultant new mutants accepted NADH as cofactor with very low K_(M)˜10 μM and greatly reduced NADPH activity. Examples of these mutants include: JEA1 (SEQ ID NO: 79), JEG2 (SEQ ID NO: 80), JEG4 (SEQ ID NO: 81), JEA7 (SEQ ID NO: 82) and JED1 (SEQ ID NO: 83).

Following domain swapping experiments, the mutants that possessed very low K_(M) for NADH had the following substitutions:

-   -   dd) the residue at position 24 has an amino acid substitution of         phenylalanine;     -   ee) the residue at position 50 has an amino acid substitution of         alanine, asparagine, or phenylalanine;     -   ff) the residue at position 52 has an amino acid substitution of         aspartic acid;     -   gg) the residue at position 53 has an amino acid substitution of         alanine;     -   hh) the residue at position 61 has an amino acid substitution of         phenylalanine;     -   ii) the residue at position 156 has an amino acid substitution         of valine;     -   jj) the residue at position 33 has an amino acid substitution of         leucine;     -   kk) the residue at position 47 has an amino acid substitution of         asparagine, proline; and phenylalanine;     -   ll) the residue at position 80 has an amino acid substitution of         isoleucine.

In one embodiment the present method includes a mutant polypeptide having KARI activity, said polypeptide having an amino acid sequence selected from the group consisting of SEQ ID NO: 24-28, 67-70, and 75-98,

In another embodiment the method provides an NADH utilizing KARI mutant with a K_(M) for NADH<15 μM.

In a preferred embodiment, the mutant KARI JEA1 (SEQ ID NO: 79) has the following substitutions: Y24F/C33L/R47P/S50F/T52D/L61F/T80I/A156V

In another preferred embodiment, the mutant KARI JEG2 (SEQ ID NO: 80) has the following substitutions:

(Y24F/C33L/R47F/S50A/T52D/V53A/L61F/T80I/A156V)

In another preferred embodiment, the mutant KARI JEG4 (SEQ ID NO: 81), has the following substitutions:

(Y24F/C33L/R47N/S50N/T52D/V53A/L61F/T80I/A156V)

In another preferred embodiment, the mutant KARI JEA7 (SEQ ID NO: 82), has the following substitutions:

(Y24F/C33L/R47P/S50N/T52D/V53A/L61F/T80I/A156V)

In another preferred embodiment, the mutant KARI JED1 (SEQ ID NO: 83) has the following substitutions:

(C33L/R47N/S50N/T52D/V53A/L61F/T80I/A156V)

In another embodiment the method provides an NADH accepting KARI mutant wherein the ratio of NADH/NADPH activity is greater than one. A consensus sequence for the mutant ilvC was generated from the multiple sequence alignment and is provided as SEQ ID NO: 29 which represents all experimentally verified mutations of the KARI enzyme based on the amino acid sequence of the KARI enzyme isolated from Pseudomonas fluorescens (SEQ ID NO:17).

The Host Strains for KARI Engineering

Two host strains, E. coli TOP10 from Invitrogen and E. coli Bw25113 (ΔilvC, an ilvC gene-knockout), were used for making constructs over-expressing the KARI enzyme in this disclosure. In the Bw25113 strain, the entire ilvC gene of the E. coli chromosome was replaced by a Kanamycin cassette using the Lambda red homology recombination technology described by Kirill et al., (Kirill A. Datsenko and Barry L. Wanner, Proc. Natl. Acad. Sci, USA, 97: 6640-6645, 2000).

Homology Modeling of PF5 KARI with Bound Substrates

The structure of PF5-KARI with bound NADPH, acetolactate and magnesium ions was built based on the crystal structure of P. aeruginosa PAO1-KARI (PDB ID 1NP3, Ahn H. J. et al., J. Mol. Biol., 328: 505-515, 2003) which has 92% amino acid sequence homology to PF5 KARI. PAO1-KARI structure is a homo-dodecamer and each dodecamer consists of six homo-dimers with extensive dimer interface. The active site of KARI is located in this dimer interface. The biological assembly is formed by six homo-dimers positioned on the edges of a tetrahedron resulting in a highly symmetrical dodecamer of 23 point group symmetry. For simplicity, only the dimeric unit (monomer A and monomer B) was built for the homology model of PF5-KARI in this study because the active site is in the homo-dimer interface.

The model of PF5-KARI dimer was built based on the coordinates of monomer A and monomer B of PAO1-KARI and sequence of PF5-KARI using DeepView/Swiss PDB viewer (Guex, N. and Peitsch, M. C., Electrophoresis, 18: 2714-2723, 1997). This model was then imported to program O (Jones, T. A. et al, Acta Crystallogr. A 47: 110-119, 1991) on a Silicon Graphics system for further modification.

The structure of PAO1-KARI has no NADPH, substrate or inhibitor or magnesium in the active site. Therefore, the spinach KARI structure (PDB ID 1yve, Biou V. et al., The EMBO Journal, 16: 3405-3415, 1997.), which has magnesium ions, NADPH and inhibitor (N-Hydroxy-N-isopropyloxamate) in the acetolacate binding site, was used to model these molecules in the active site. The plant KARI has very little sequence homology to either PF5- or PAO1 KARI (<20% amino acid identity), however the structures in the active site region of these two KARI enzymes are very similar. To overlay the active site of these two KARI structures, commands LSQ_ext, LSQ_improve, LSQ_mol in the program O were used to line up the active site of monomer A of spinach KARI to the monomer A of PF5 KARI model. The coordinates of NADPH, two magnesium ions and the inhibitor bound in the active site of spinach KARI were extracted and incorporated to molecule A of PF5 KARL A set of the coordinates of these molecules were generated for monomer B of PF5 KARI by applying the transformation operator from monomer A to monomer B calculated by the program.

Because there is no NADPH in the active site of PAO1 KARI crystal structure, the structures of the phosphate binding loop region in the NADPH binding site (residues 44-45 in PAO1 KARI, 157-170 in spinach KARI) are very different between the two. To model the NADPH bound form, the model of the PF5-KARI phosphate binding loop (44-55) was replaced by that of 1yve (157-170). Any discrepancy of side chains between these two was converted to those in the PF5-KARI sequence using the mutate_replace command in program O, and the conformations of the replaced side-chains were manually adjusted. The entire NADPH/Mg/inhibitor bound dimeric PF5-KARI model went through one round of energy minimization using program CNX (ACCELRYS San Diego Calif., Burnger, A. T. and Warren, G. L., Acta Crystallogr., D 54: 905-921, 1998) after which the inhibitor was replaced by the substrate, acetolactate (AL), in the model. The conformation of AL was manually adjusted to favor hydride transfer of C4 of the nicotinamine of NADPH and the substrate. No further energy minimization was performed on this model (coordinates of the model created for this study are attached in a separate word file). The residues in the phosphate binding loop and their interactions with NADPH are illustrated in FIG. 3.

Application of a “Profile Hidden Markov Model” for Identification of Residue Positions Involved in Cofactor Switching in KARI Enzymes

Applicants have developed a method for identifying KARI enzymes and the residue positions that are involved in cofactor switching from NADPH to NADH. To structurally characterize KARI enzymes, a Profile Hidden Markov Model (HMM) was prepared as described in Example 5 using amino acid sequences of 25 KARI proteins with experimentally verified function as outlined in Table 6. These KARIs were from [Pseudomonas fluorescens Pf-5 (SEQ ID NO: 17), Sulfolobus solfataricus P2 (SEQ ID NO: 13), Pyrobaculum aerophilum str. IM2 (SEQ ID NO: 14), Natronomonas pharaonis DSM 2160 (SEQ ID NO: 30), Bacillus subtilis subsp. subtilis str. 168 (SEQ ID NO: 31), Corynebacterium glutamicum ATCC 13032 (SEQ ID NO: 32), Phaeospirilum molischianum (SEQ ID NO: 33), Ralstonia solanacearum GMI1000 (SEQ ID NO: 15), Zymomonas mobilis subsp. mobilis ZM4 (SEQ ID NO: 34), Alkalilimnicola ehrlichei MLHE-1 (SEQ ID NO: 35), Campylobacter lari RM2100 (SEQ ID NO: 36), Marinobacter aquaeolei VT8 (SEQ ID NO: 37), Psychrobacter arcticus 273-4 (SEQ ID NO: 38), Hahella chejuensis KCTC 2396 (SEQ ID NO: 39), Thiobacillus denitrificans ATCC 25259 (SEQ ID NO: 40), Azotobacter vinelandii AvOP (SEQ ID NO: 41), Pseudomonas syringae pv. syringae B728a (SEQ ID NO: 42), Pseudomonas syringae pv. tomato str. DC3000 (SEQ ID NO: 43), Pseudomonas putida KT2440 (Protein SEQ ID NO: 44), Pseudomonas entomophila L48 (SEQ ID NO: 45), Pseudomonas mendocina ymp (SEQ ID NO: 46), Pseudomonas aeruginosa PAO1 (SEQ ID NO: 16), Bacillus cereus ATCC 10987 (SEQ ID NO: 47), Bacillus cereus ATCC 10987(SEQ ID NO: 48), and Spinacia oleracea (SEQ ID NO: 18).

In addition using methods disclosed in this application, sequences of Class II KARI enzymes such as E. coli (SEQ ID NO: 63—GenBank Accession Number P05793), marine gamma Proteobacterium HTCC2207 (SEQ ID NO: 64—GenBank Accession Number ZP_(—)01224863.1), Desulfuromonas acetoxidans (SEQ ID NO: 65—GenBank Accession Number ZP_(—)01313517.1) and Pisum sativum (pea) (SEQ ID NO: 66—GenBank Accession Number O82043) could be mentioned.

This Profile HMM for KARIs may be used to identify any KARI related proteins. Any protein that matches the Profile HMM with an E value of <10⁻³ using hmmsearch program in the HMMER package is expected to be a functional KARI, which can be either a Class I and Class II KARI. Sequences matching the Profile HMM given herein are then analyzed for the location of the 12 positions in Pseudomonas fluorescens Pf-5 that switches the cofactor from NADPH to NADH. The eleven nodes, as defined in the section of Profile HMM building, in the profile HMM representing the columns in the alignment which correspond to the eleven co-factor switching positions in Pseudomonas fluorescens Pf-5 KARI are identified as node 24, 33, 47, 50, 52, 53,61, 80, 115, 156 and 170. The lines corresponding to these nodes in the model file are identified in Table 9. One skilled in the art will readily be able to identify these 12 positions in the amino acid sequence of a KARI protein from the alignment of the sequence to the profile HMM using hmm search program in HMMER package.

The KARI enzymes identified by this method, include both Class I and Class II KARI enzymes from either microbial or plant natural sources. Any KARI identified by this method may be used for heterologous expression in microbial cells.

For example each of the KARI encoding nucleic acid fragments described herein may be used to isolate genes encoding homologous proteins. Isolation of homologous genes using sequence-dependent protocols is well known in the art. Examples of sequence-dependent protocols include, but are not limited to: 1) methods of nucleic acid hybridization; 2) methods of DNA and RNA amplification, as exemplified by various uses of nucleic acid amplification technologies [e.g., polymerase chain reaction (PCR) (Mullis et al., U.S. Pat. No. 4,683,202); ligase chain reaction (LCR) (Tabor, S. et al., Proc. Acad. Sci. USA 82:1074, 1985); or strand displacement amplification (SDA) (Walker, at al., Proc. Natl. Acad. Sci. U.S.A., 89: 392, 1992); and 3) methods of library construction and screening by complementation.

Although the sequence homology between Class I and Class II KARI enzymes is low, the three dimensional structure of both Classes of the enzymes, particularly around the active site and nucleotide binding domains is highly conserved (Tygai, R., et al., Protein Science, 34: 399-408, 2001). The key amino acid residues that make up the substrate binding pocket are highly conserved between these two Classes even though they may not align well in a simple sequence comparison. It can therefore be concluded that the residues affecting cofactor specificity identified in Class I KARI (e.g., positions 24, 33, 47, 50, 52, 53, 61, 80, 115, 156, and 170 of PF5 KARI) can be extended to Class II KARI enzymes.

Isobutanol Biosynthetic Pathways

Carbohydrate utilizing microorganisms employ the Embden-Meyerhof-Parnas (EMP) pathway, the Entner and Doudoroff pathway (EDP) and the pentose phosphate pathway (PPP) as the central, metabolic routes to provide energy and cellular precursors for growth and maintenance. These pathways have in common the intermediate glyceraldehyde-3-phosphate and, ultimately, pyruvate is formed directly or in combination with the EMP pathway. Subsequently, pyruvate is transformed to acetyl-cofactor A (acetyl-CoA) via a variety of means. Acetyl-CoA serves as a key intermediate, for example, in generating fatty acids, amino acids and secondary metabolites. The combined reactions of sugar conversion to pyruvate produce energy (e.g., adenosine-5′-triphosphate, ATP) and reducing equivalents (e.g., reduced nicotinamide adenine dinucleotide, NADH, and reduced nicotinamide adenine dinucleotide phosphate, NADPH). NADH and NADPH must be recycled to their oxidized forms (NAD⁺ and NADP⁺, respectively). In the presence of inorganic electron acceptors (e.g. O₂, NO₃ ⁻ and SO₄ ²⁻), the reducing equivalents may be used to augment the energy pool; alternatively, a reduced carbon byproduct may be formed.

There are four potential pathways for production of isobutanol from carbohydrate sources with recombinant microorganisms as shown in FIG. 1. All potential pathways for conversion of carbohydrates to isobutanol have been described in the commonly owned U.S. patent application Ser. No. 11/586,315, which is incorporated herein by reference.

The preferred pathway for conversion of pyruvate to isobutanol consists of enzymatic steps “a”, “b”, “c”, “d”, and “e” (FIGS. 1A and 1B) and includes the following substrate to product conversions:

-   -   a) pyruvate to acetolactate, as catalyzed for example by         acetolactate synthase,     -   b) (S)-acetolactate to 2,3-dihydroxyisovalerate, as catalyzed         for example by acetohydroxy acid isomeroreductase,     -   c) 2,3-dihydroxyisovalerate to α-ketoisovalerate, as catalyzed         for example by acetohydroxy acid dehydratase,     -   d) α-ketoisovalerate to isobutyraldehyde, as catalyzed for         example by a branched-chain keto acid decarboxylase, and     -   e) isobutyraldehyde to isobutanol, as catalyzed for example by,         a branched-chain alcohol dehydrogenase.

This pathway combines enzymes involved in well-characterized pathways for valine biosynthesis (pyruvate to α-ketoisovalerate) and valine catabolism (α-ketoisovalerate to isobutanol). Since many valine biosynthetic enzymes also catalyze analogous reactions in the isoleucine biosynthetic pathway, substrate specificity is a major consideration in selecting the gene sources. For this reason, the primary genes of interest for the acetolactate synthase enzyme are those from Bacillus (alsS) and Klebsiella (budB). These particular acetolactate synthases are known to participate in butanediol fermentation in these microorganisms and show increased affinity for pyruvate over ketobutyrate (Gallop et al., J. Bacterial., 172: 3444-3449, 1990); and (Holtzclaw et al., J. Bacterial., 121: 917-922, 1975). The second and third pathway steps are catalyzed by acetohydroxy acid reductoisomerase and dehydratase, respectively. These enzymes have been characterized from a number of sources, such as for example, E. coli (Chunduru et al., Biochemistry, 28: 486-493,1989); and (Flint et al., J. Biol. Chem., 268: 14732-14742, 1993). The final two steps of the preferred isobutanol pathway are known to occur in yeast, which can use valine as a nitrogen source and, in the process, secrete isobutanol. α-Ketoiso-valerate can be converted to isobutyraldehyde by a number of keto acid decarboxylase enzymes, such as for example pyruvate decarboxylase. To prevent misdirection of pyruvate away from isobutanol production, a decarboxylase with decreased affinity for pyruvate is desired. So far, there are two such enzymes known in the art (Smit et al., Appl. Environ. Microbiol., 71: 303-311, 2005); and (de la Plaza et al., FEMS Microbial. Lett., 238: 367-374, 2004). Both enzymes are from strains of Lactococcus lactis and have a 50-200-fold preference for ketoisovalerate over pyruvate. Finally, a number of aldehyde reductases have been identified in yeast, many with overlapping substrate specificity. Those known to prefer branched-chain substrates over acetaldehyde include, but are not limited to, alcohol dehydrogenase VI (ADH6) and Ypr1p (Larroy at al., Biochem. J., 361: 163-172, 2002); and (Ford et al., Yeast, 19: 1087-1096, 2002), both of which use NADPH as electron donor. An NADPH-dependent reductase, YqhD, active with branched-chain substrates has also been recently identified in E. coli (Sulzenbacher at al., J. Mol. Biol., 342: 489-502, 2004).

Two of the other potential pathways for isobutanol production also contain the initial three steps of “a”, “b” and “c” (FIG. 1A). One pathway consists of enzymatic steps “a”, “b”, “c”, “f”, “g”, “e” (FIGS. 1A and 1B). Step “f” containing a “branched-chain keto acid dehydrogenase (EC1.2.4.4). Step “g” containing an “acylating aldehyde dehydrogenase” (EC1.2.1.10) and 1.2.1.57 in addition to step “e” containing the “branched chain alcohol dehydrogenase”. The other potential pathway consists of steps “a”, “b”, “c”, “h”, “i”, “j”, “e” (FIGS. 1A and 1B). The term “transaminase” (step “h”) EC numbers 2.6.1.42 and 2.6.1.66, Step “h” consists of either a “valine dehydrogenase” (EC1.4.1.8 and EC1.4.1.9) or step “i”, a “valine decarboxylase” with an EC number 4.1.1.14. Finally step “j” will use an “omega transaminase” (EC2.6.1.18) to generate isobutyraldehyde which will be reduced by step “e” to produce isobutanol. All potential pathways for conversion of pyruvate to isobutanol are depicted in FIGS. 1A and 1B.

Additionally, a number of microorganisms are known to produce butyrate and/or butanol via a butyryl-CoA intermediate (Dürre, at al., FEMS Microbiol. Rev., 17: 251-262, 1995); and (Abbad-Andaloussi et al., Microbiology, 142: 1149-1158, 1996). Therefore isobutanol production in these microorganisms will take place using steps “k”, “g” and “e” shown in FIG. 1B. Step “k” will use an “isobutyryl-CoA mutase” (EC5.4.99.13). The nest step will involve using the “acylating aldehyde dehydrogenase” (EC 1.2.1.10 and EC1.2.1.57) to produce isobutyraldehyde followed by enzymatic step “e” to produce isobutanol. All these pathways are fully described in the commonly owned patent application Ser. No. 11/586,315, herein incorporated by reference.

Thus, in providing multiple recombinant pathways from pyruvate to isobutanol, there exist a number of choices to fulfill the individual conversion steps, and the person of skill in the art will be able to use publicly available sequences to construct the relevant pathways.

Microbial Hosts for Isobutanol Production

Microbial hosts for isobutanol production may be selected from bacteria, cyanobacteria, filamentous fungi and yeasts. The microbial host used for isobutanol production should be tolerant to isobutanol so that the yield is not limited by butanol toxicity. Microbes that are metabolically active at high titer levels of isobutanol are not well known in the art. Although butanol-tolerant mutants have been isolated from solventogenic Clostridia, little information is available concerning the butanol tolerance of other potentially useful bacterial strains. Most of the studies on the comparison of alcohol tolerance in bacteria suggest that butanol is more toxic than ethanol (de Cavalho, et al., Microsc. Res. Tech., 64; 215-22, 2004) and (Kabelitz, et al., FEMS Microbiol. Lett., 220: 223-227, 2003, Tomas, at al., J. Bacteriol., 186: 2006-2018, 2004) report that the yield of 1-butanol during fermentation in Clostridium acetobutylicum may be limited by 1-butanol toxicity. The primary effect of 1-butanol on Clostridium acetobutylicum is disruption of membrane functions (Hermann et al., Appl. Environ. Microbiol., 50; 1238-1243, 1985).

The microbial hosts selected for the production of isobutanol should be tolerant to isobutanol and should be able to convert carbohydrates to isobutanol. The criteria for selection of suitable microbial hosts include the following: intrinsic tolerance to isobutanol, high rate of glucose utilization, availability of genetic tools for gene manipulation, and the ability to generate stable chromosomal alterations.

Suitable host strains with a tolerance for isobutanol may be identified by screening based on the intrinsic tolerance of the strain. The intrinsic tolerance of microbes to isobutanol may be measured by determining the concentration of isobutanol that is responsible for 50% inhibition of the growth rate (IC₅₀) when grown in a minimal medium. The IC₅₀ values may be determined using methods known in the art. For example, the microbes of interest may be grown in the presence of various amounts of isobutanol and the growth rate monitored by measuring the optical density at 600 nanometers. The doubling time may be calculated from the logarithmic part of the growth curve and used as a measure of the growth rate. The concentration of isobutanol that produces 50% inhibition of growth may be determined from a graph of the percent inhibition of growth versus the isobutanol concentration. Preferably, the host strain should have an IC₅₀ for isobutanol of greater than about 0.5%.

The microbial host for isobutanol production should also utilize glucose at a high rate. Most microbes are capable of metabolizing carbohydrates. However, certain environmental microbes cannot metabolize carbohydrates to high efficiency, and therefore would not be suitable hosts.

The ability to genetically modify the host is essential for the production of any recombinant microorganism. The mode of gene transfer technology may be by electroporation, conjugation, transduction or natural transformation. A broad range of host conjugative plasmids and drug resistance markers are available. The cloning vectors are tailored to the host microorganisms based on the nature of antibiotic resistance markers that can function in that host.

The microbial host also has to be manipulated in order to inactivate competing pathways for carbon flow by deleting various genes. This requires the availability of either transposons to direct inactivation or chromosomal integration vectors. Additionally, the production host should be amenable to chemical mutagenesis so that mutations to improve intrinsic isobutanol tolerance may be obtained.

Based on the criteria described above, suitable microbial hosts for the production of isobutanol include, but are not limited to, members of the genera Clostridium, Zymomonas, Escherichia, Salmonella, Rhodococcus, Pseudomonas, Bacillus, Vibrio, Lactobacillus, Enterococcus, Alcaligenes, Kiebsiella, Paenibacillus, Arthrobacter, Corynebacterium, Brevibacterium, Pichia, Candida, Hansenula and Saccharomyces. Preferred hosts include: Escherichia coli, Alcaligenes eutrophus, Bacillus licheniformis, Paenibacillus macerans, Rhodococcus erythropolis, Pseudomonas putida, Lactobacillus plantarum, Enterococcus faecium, Enterococcus gallinarium, Enterococcus faecalis, Bacillus subtilis and Saccharomyces cerevisiae.

Construction of Production Host

Recombinant microorganisms containing the necessary genes that will encode the enzymatic pathway for the conversion of a fermentable carbon substrate to isobutanol may be constructed using techniques well known in the art. In the present invention, genes encoding the enzymes of one of the isobutanol biosynthetic pathways of the invention, for example, acetolactate synthase, acetohydroxy acid isomeroreductase, acetohydroxy acid dehydratase, branched-chain α-keto acid decarboxylase, and branched-chain alcohol dehydrogenase, may be isolated from various sources, as described above.

Methods of obtaining desired genes from a bacterial genome are common and well known in the art of molecular biology. For example, if the sequence of the gene is known, suitable genomic libraries may be created by restriction endonuclease digestion and may be screened with probes complementary to the desired gene sequence. Once the sequence is isolated, the DNA may be amplified using standard primer-directed amplification methods such as polymerase chain reaction (U.S. Pat. No. 4,683,202) to obtain amounts of DNA suitable for transformation using appropriate vectors. Tools for codon optimization for expression in a heterologous host are readily available. Some tools for codon optimization are available based on the GC content of the host microorganism.

Once the relevant pathway genes are identified and isolated they may be transformed into suitable expression hosts by means well known in the art. Vectors or cassettes useful for the transformation of a variety of host cells are common and commercially available from companies such as EPICENTRE® (Madison, Wis.), Invitrogen Corp. (Carlsbad, Calif.), Stratagene (La Jolla, Calif.), and New England Biolabs, Inc. (Beverly, Mass.). Typically the vector or cassette contains sequences directing transcription and translation of the relevant gene, a selectable marker, and sequences allowing autonomous replication or chromosomal integration. Suitable vectors comprise a region 5′ of the gene which harbors transcriptional initiation controls and a region 3′ of the DNA fragment which controls transcriptional termination. Both control regions may be derived from genes homologous to the transformed host cell, although it is to be understood that such control regions may also be derived from genes that are not native to the specific species chosen as a production host.

Initiation control regions or promoters, which are useful to drive expression of the relevant pathway coding regions in the desired host cell are numerous and familiar to those skilled in the art. Virtually any promoter capable of driving these genetic elements is suitable for the present invention including, but not limited to, CYC1, HIS3, GAL1, GAL10, ADH1, PGK, PHO5, GAPDH, ADC1, TRP1, URA3, LEU2, ENO, TPI (useful for expression in Saccharomyces); AOX1 (useful for expression in Pichia); and lac, are, let, trp, IP_(L), IP_(R), T7, tac, and trc (useful for expression in Escherichia coli, Alcaligenes, and Pseudomonas) as well as the amy, apr, npr promoters and various phage promoters useful for expression in Bacillus subtilis, Bacillus licheniformis, and Paenibacillus macerans.

Termination control regions may also be derived from various genes native to the preferred hosts. Optionally, a termination site may be unnecessary, however, it is most preferred if included.

Certain vectors are capable of replicating in a broad range of host bacteria and can be transferred by conjugation. The complete and annotated sequence of pRK404 and three related vectors-pRK437, pRK442, and pRK442(H) are available. These derivatives have proven to be valuable tools for genetic manipulation in Gram-negative bacteria (Scott et al., Plasmid, 50: 74-79, 2003). Several plasmid derivatives of broad-host-range Inc P4 plasmid RSF1010 are also available with promoters that can function in a range of Gram-negative bacteria. Plasmid pAYC36 and pAYC37, have active promoters along with multiple cloning sites to allow for the heterologous gene expression in Gram-negative bacteria.

Chromosomal gene replacement tools are also widely available. For example, a thermosensitive variant of the broad-host-range replicon pWV101 has been modified to construct a plasmid pVE6002 which can be used to effect gene replacement in a range of Gram-positive bacteria (Maguin et al., J. Bacterial., 174: 5633-5638, 1992). Additionally, in vitro transposomes are available to create random mutations in a variety of genomes from commercial sources such as EPICENTRE®.

The expression of an isobutanol biosynthetic pathway in various preferred microbial hosts is described in more detail below.

Expression of an Isobutanol Biosynthetic Pathway in E. coli

Vectors or cassettes useful for the transformation of E. coli are common and commercially available from the companies listed above. For example, the genes of an isobutanol biosynthetic pathway may be isolated from various sources, cloned into a modified pUC19 vector and transformed into E. coli NM522.

Expression of an Isobutanol Biosynthetic Pathway in Rhodococcus erythropolis

A series of E. coli-Rhodococcus shuttle vectors are available for expression in R. erythropolis, including, but not limited to, pRhBR17 and pDA71 (Kostichka et al., Appl. Microbial. Biotechnol., 62: 61-68, 2003). Additionally, a series of promoters are available for heterologous gene expression in R. erythropolis (Nakashima at al., Appl. Environ, Microbiol., 70: 5557-5568, 2004 and Tao et al., Appl. Microbiol. Biotechnol., 68: 346-354, 2005). Targeted gene disruption of chromosomal genes in R. erythropolis may be created using the method described by Tao et al., supra, and Brans at al. (Appl. Environ. Microbial., 66: 2029-2036, 2000).

The heterologous genes required for the production of isobutanol, as described above, may be cloned initially in pDA71 or pRhBR71 and transformed into E. coli. The vectors may then be transformed into R. erythropolis by electroporation, as described by Kostichka at al., supra. The recombinants may be grown in synthetic medium containing glucose and the production of isobutanol can be followed using methods known in the art.

Expression of an Isobutanol Biosynthetic Pathway in B. subtilis

Methods for gene expression and creation of mutations in B. subtilis are also well known in the art. For example, the genes of an isobutanol biosynthetic pathway may be isolated from various sources, cloned into a modified pUC19 vector and transformed into Bacillus subtilis BE1010. Additionally, the five genes of an isobutanol biosynthetic pathway can be split into two operons for expression. The three genes of the pathway (bubB, ilvD, and kivD) can be integrated into the chromosome of Bacillus subtilis BE1010 (Payne, et al., J. Bacteriol., 173, 2278-2282, 1991). The remaining two genes (ilvC and bdhB) can be cloned into an expression vector and transformed into the Bacillus strain carrying the integrated isobutanol genes.

Expression of an Isobutanol Biosynthetic Pathway in B. licheniformis

Most of the plasmids and shuttle vectors that replicate in B. subtilis may be used to transform B. licheniformis by either protoplast transformation or electroporation. The genes required for the production of isobutanol may be cloned in plasmids pBE20 or pBE60 derivatives (Nagarajan et al., Gene, 114: 121-126, 1992). Methods to transform B. licheniformis are known in the art (Fleming et al. Appl. Environ. Microbiol., 61: 3775-3780, 1995). The plasmids constructed for expression in B. subtilis may be transformed into B. licheniformis to produce a recombinant microbial host that produces isobutanol.

Expression of an Isobutanol Biosynthetic Pathway in Paenibacillus macerans

Plasmids may be constructed as described above for expression in B. subtilis and used to transform Paenibacillus macerans by protoplast transformation to produce a recombinant microbial host that produces isobutanol.

Expression of the Isobutanol Biosynthetic Pathway in Alcaligenes (Ralstonia) eutrophus

Methods for gene expression and creation of mutations in Alcaligenes eutrophus are known in the art (Taghavi et al., Appl. Environ. Microbial., 60: 3585-3591, 1994). The genes for an isobutanol biosynthetic pathway may be cloned in any of the broad host range vectors described above, and electroporated to generate recombinants that produce isobutanol. The poly(hydroxybutyrate) pathway in Alcaligenes has been described in detail, a variety of genetic techniques to modify the Alcaligenes eutrophus genome is known, and those tools can be applied for engineering an isobutanol biosynthetic pathway.

Expression of an Isobutanol Biosynthetic Pathway in Pseudomonas putida

Methods for gene expression in Pseudomonas putida are known in the art (see for example Ben-Bassat et al., U.S. Pat. No. 6,586,229, which is incorporated herein by reference). The butanol pathway genes may be inserted into pPCU18 and this ligated DNA may be electroporated into electrocompetent Pseudomonas putida DOT-T1 C5aAR1 cells to generate recombinants that produce isobutanol.

Expression of an Isobutanol Biosynthetic Pathway in Saccharomyces cerevisiae

Methods for gene expression in Saccharomyces cerevisiae are known in the art (e.g., Methods in Enzymology, Volume 194, Guide to Yeast Genetics and Molecular and Cell Biology, Part A, 2004, Christine Guthrie and Gerald R. Fink, eds., Elsevier Academic Press, San Diego, Calif.). Expression of genes in yeast typically requires a promoter, followed by the gene of interest, and a transcriptional terminator. A number of yeast promoters can be used in constructing expression cassettes for genes encoding an isobutanol biosynthetic pathway, including, but not limited to constitutive promoters FBA, GPD, ADH1, and GPM, and the inducible promoters GAL1, GAL10, and CUP1. Suitable transcriptional terminators include, but are not limited to FBAt, GPDt, GPMt, ERG10t, GAU1t, CYC1, and ADH1. For example, suitable promoters, transcriptional terminators, and the genes of an isobutanol biosynthetic pathway may be cloned into E. coli-yeast shuttle vectors.

Expression of an Isobutanol Biosynthetic Pathway in Lactobacillus plantarum

The Lactobacillus genus belongs to the Lactobacillales family and many plasmids and vectors used in the transformation of Bacillus subtilis and Streptococcus may be used for lactobacillus. Non-limiting examples of suitable vectors include pAMβ1 and derivatives thereof (Renault et al., Gene 183:175-182, 1996); and (O'Sullivan et al., Gene, 137: 227-231, 1993); pMBB1 and pHW800, a derivative of pMBB1 (Wyckoff et al., Appl. Environ. Microbial., 62: 1481-1486, 1996); pMG1, a conjugative plasmid (Tanimoto et al., J. Bacteriol., 184: 5800-5804, 2002); pNZ9520 (Kleerebezem et al., Appl. Environ. Microbial., 63: 4581-4584, 1997); pAM401 (Fujimoto at al., Appl. Environ. Microbial., 67: 1262-1267, 2001); and pAT392 (Arthur et al., Antimicrob. Agents Chemother., 38: 1899-1903, 1994). Several plasmids from Lactobacillus plantarum have also been reported (van Kranenburg R, et al. Appl. Environ. Microbial., 71: 1223-1230, 2005).

Expression of an Isobutanol Biosynthetic Pathway in Various Enterococcus species (E. faecium, E. gallinarium, and E. faecalis)

The Enterococcus genus belongs to the Lactobacillales family and many plasmids and vectors used in the transformation of Lactobacilli, Bacilli and Streptococci species may be used for Enterococcus species. Non-limiting examples of suitable vectors include pAM31 and derivatives thereof (Renault at al., Gene, 183: 175-182, 1996); and (O'Sullivan et al., Gene, 137: 227-231, 1993); pMBB1 and pHW800, a derivative of pMBB1 (Wyckoff at al. Appl. Environ. Microbial., 62: 1481-1486, 1996); pMG1, a conjugative plasmid (Tanimoto et al., J. Bacteriol., 184: 5800-5804, 2002); pNZ9520 (Kleerebezem et al., Appl. Environ. Microbial., 63: 4581-4584, 1997); pAM401 (Fujimoto et al., Appl. Environ. Microbial., 67: 1262-1267, 2001); and pAT392 (Arthur at al., Antimicrob. Agents Chemother., 38:, 1899-1903, 1994). Expression vectors for E. faecalis using the nisA gene from Lactococcus may also be used (Eichenbaum et al., Appl. Environ. Microbial., 64: 2763-2769, 1998). Additionally, vectors for gene replacement in the E. faecium chromosome may be used (Nallaapareddy et al., Appl. Environ. Microbial., 72: 334-345, 2006).

Fermentation Media

Fermentation media in the present invention must contain suitable carbon substrates. Suitable substrates may include but are not limited to monosaccharides such as glucose and fructose, oligosaccharides such as lactose or sucrose, polysaccharides such as starch or cellulose or mixtures thereof and unpurified mixtures from renewable feedstocks such as cheese whey permeate, cornsteep liquor, sugar beet molasses, and barley malt. Additionally the carbon substrate may also be one-carbon substrates such as carbon dioxide, or methanol for which metabolic conversion into key biochemical intermediates has been demonstrated. In addition to one and two carbon substrates methylotrophic microorganisms are also known to utilize a number of other carbon containing compounds such as methylamine, glucosamine and a variety of amino acids for metabolic activity. For example, methylotrophic yeast are known to utilize the carbon from methylamine to form trehalose or glycerol (Bellion et al., Microb. Growth C1 Compd., [Int. Symp.], 7th (1993), 415-32. (eds): Murrell, J. Coffin; Kelly, Don P. Publisher: Intercept, Andover, UK). Similarly, various species of Candida will metabolize alanine or oleic acid (Sulter et al., Arch. Microbiol., 153: 485-489, 1990). Hence it is contemplated that the source of carbon utilized in the present invention may encompass a wide variety of carbon containing substrates and will only be limited by the choice of microorganism.

Although it is contemplated that all of the above mentioned carbon substrates and mixtures thereof are suitable in the present invention, preferred carbon substrates are glucose, fructose, and sucrose.

In addition to an appropriate carbon source, fermentation media must contain suitable minerals, salts, cofactors, buffers and other components, known to those skilled in the art, suitable for growth of the cultures and promotion of the enzymatic pathway necessary for isobutanol production.

Culture Conditions

Typically cells are grown at a temperature in the range of about 25° C. to about 40° C. in an appropriate medium. Suitable growth media in the present invention are common commercially prepared media such as Luria Bertani (LB) broth, Sabouraud Dextrose (SD) broth or Yeast Medium (YM) broth. Other defined or synthetic growth media may also be used, and the appropriate medium for growth of the particular microorganism will be known by one skilled in the art of microbiology or fermentation science. The use of agents known to modulate catabolite repression directly or indirectly, e.g., cyclic adenosine 2′,3′-monophosphate (cAMP), may also be incorporated into the fermentation medium.

Suitable pH ranges for the fermentation are between pH 5.0 to pH 9.0, where pH 6.0 to pH 8.0 is preferred for the initial condition.

Fermentations may be performed under aerobic or anaerobic conditions, where anaerobic or microaerobic conditions are preferred.

Industrial Batch and Continuous Fermentations

The present process employs a batch method of fermentation. A classical batch fermentation is a closed system where the composition of the medium is set at the beginning of the fermentation and not subject to artificial alterations during the fermentation. Thus, at the beginning of the fermentation the medium is inoculated with the desired microorganism or microorganisms, and fermentation is permitted to occur without adding anything to the system. Typically, however, a “batch” fermentation is batch with respect to the addition of carbon source and attempts are often made at controlling factors such as pH and oxygen concentration. In batch systems the metabolite and biomass compositions of the system change constantly up to the time the fermentation is stopped. Within batch cultures cells moderate through a static lag phase to a high growth log phase and finally to a stationary phase where growth rate is diminished or halted. If untreated, cells in the stationary phase will eventually die. Cells in log phase generally are responsible for the bulk of production of end product or intermediate.

A variation on the standard batch system is the Fed-Batch system. Fed-Batch fermentation processes are also suitable in the present invention and comprise a typical batch system with the exception that the substrate is added in increments as the fermentation progresses. Fed-Batch systems are useful when catabolite repression is apt to inhibit the metabolism of the cells and where it is desirable to have limited amounts of substrate in the medium. Measurement of the actual substrate concentration in Fed-Batch systems is difficult and is therefore estimated on the basis of the changes of measurable factors such as pH, dissolved oxygen and the partial pressure of waste gases such as CO₂. Batch and Fed-Batch fermentations are common and well known in the art and examples may be found in Thomas D. Brock in Biotechnology: A Textbook of Industrial Microbiology, Second Edition (1989) Sinauer Associates, Inc., Sunderland, Mass., or Deshpande, Mukund (Appl. Biochem. Biotechnol., 36: 227, 1992), herein incorporated by reference.

Although the present invention is performed in batch mode it is contemplated that the method would be adaptable to continuous fermentation methods. Continuous fermentation is an open system where a defined fermentation medium is added continuously to a bioreactor and an equal amount of conditioned medium is removed simultaneously for processing. Continuous fermentation generally maintains the cultures at a constant high density where cells are primarily in log phase growth.

Continuous fermentation allows for modulation of one factor or any number of factors that affect cell growth or end product concentration. For example, one method will maintain a limiting nutrient such as the carbon source or nitrogen level at a fixed rate and allow all other parameters to moderate. In other systems a number of factors affecting growth may be altered continuously while the cell concentration, measured by medium turbidity, is kept constant. Continuous systems strive to maintain steady state growth conditions and thus the cell loss due to the medium being drawn off must be balanced against the cell growth rate in the fermentation. Methods of modulating nutrients and growth factors for continuous fermentation processes as well as techniques for maximizing the rate of product formation are well known in the art of industrial microbiology and a variety of methods are detailed by Brock, supra.

It is contemplated that the present invention may be practiced using either batch, fed-batch or continuous processes and that any known mode of fermentation would be suitable. Additionally, it is contemplated that cells may be immobilized on a substrate as whole cell catalysts and subjected to fermentation conditions for isobutanol production.

Methods for Isobutanol Isolation from the Fermentation Medium

The biologically produced isobutanol may be isolated from the fermentation medium using methods known in the art for Acetone-butanol-ethanol (ABE) fermentations (see for example, Durre, Appl. Microbial. Biotechnol. 49: 639-648, 1998), and (Groot et al., Process. Biochem. 27: 61-75, 1992 and references therein). For example, solids may be removed from the fermentation medium by centrifugation, filtration, decantation and isobutanol may be isolated from the fermentation medium using methods such as distillation, azeotropic distillation, liquid-liquid extraction, adsorption, gas stripping, membrane evaporation, or pervaporation.

EXAMPLES

The present invention is further defined in the following Examples. It should be understood that these Examples, while indicating preferred embodiments of the invention, are given by way of illustration only. From the above discussion and these Examples, one skilled in the art can ascertain the essential characteristics of this invention, and without departing from the spirit and scope thereof, can make various changes and modifications of the invention to adapt it to various uses and conditions.

General Methods

Standard recombinant DNA and molecular cloning techniques used in the Examples are well known in the art and are described by Sambrook, J., Fritsch, E. F. and Maniatis, T., Molecular Cloning: A Laboratory Manual, Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N.Y., 1989, by T. J. Silhavy, M. L. Bennan, and L. W. Enquist, Experiments with Gene Fusions, Cold Spring Harbor Laboratory, Cold Spring Harbor, N.Y., 1984, and by Ausubel, F. M. et al., Current Protocols in Molecular Biology, Greene Publishing Assoc. and Wiley-Interscience, N.Y., 1987.

Materials and methods suitable for the maintenance and growth of bacterial cultures are also well known in the art. Techniques suitable for use in the following Examples may be found in Manual of Methods for General Bacteriology, Phillipp Gerhardt, R. G. E. Murray, Ralph N. Costilow, Eugene W. Nester, Willis A. Wood, Noel R. Krieg and G. Briggs Phillips, eds., American Society for Microbiology, Washington, D.C., 1994, or by Thomas D. Brock in Biotechnology: A Textbook of Industrial Microbiology, Second Edition, Sinauer Associates, Inc., Sunderland, Mass., 1989. All reagents, restriction enzymes and materials used for the growth and maintenance of bacterial cells were obtained from Aldrich Chemicals (Milwaukee, Wis.), BD Diagnostic Systems (Sparks, Md.), Life Technologies (Rockville, Md.), or Sigma Chemical Company (St. Louis, Mo.), unless otherwise specified.

The meaning of abbreviations used is as follows: “Å” means Angstrom, “min” means minute(s), “h” means hour(s), “μl” means microliter(s), “ng/μl” means nano gram per microliter, “pmol/μl” means pica mole per microliter, “ml” means milliliter(s), “L” means liter(s), “g/L” mean gram per liter, “ng” means nano gram, “sec” means second(s), “ml/min” means milliliter per minute(s), “w/v” means weight per volume, “v/v” means volume per volume, “nm” means nanometer(s), “mm” means millimeter(s), “cm” means centimeter(s), “mM” means millimolar, “M” means molar, “mmol” means millimole(s), “μmole” means micromole(s), g” means gram(s), “μg” means microgram(s), “mg” means milligram(s), “g” means the gravitation constant, “rpm” means revolutions per minute, “HPLC” means high performance liquid chromatography, “MS” means mass spectrometry, “HPLC/MS” means high performance liquid chromatography/mass spectrometry, “EDTA” means ethylendiamine-tetraacetic acid, “dNTP” means deoxynucleotide triphosphate, “° C.” means degrees Celsius, and “V” means voltage.

The oligonucleotide primers used in the following Examples have been described herein (see Table 1).

High Throughput Screening Assay of Gene Libraries

High throughput screening of the gene libraries of mutant KARI enzymes was performed as described herein: 10× freezing medium containing 554.4 g/L glycerol, 68 mM of (NH₄)₂SO₄, 4 mM MgSO₄, 17 mM sodium citrate, 132 mM KH₂PO₄, 36 mM K₂HPO₄ was prepared with molecular pure water and filter-sterilized. Freezing medium was prepared by diluting the 10× freezing medium with the LB medium. An aliquot (200 μl) of the freezing medium was used for each well of the 96-well archive plates (cat #3370, Corning Inc, Corning, N.Y.).

Clones from the LB agar plates were selected and inoculated into the 96-well archive plates containing the freezing medium and grown overnight at 37° C. without shaking. The archive plates were then stored at −80° C. E. coli strain Bw25113 transformed with pBAD-HisB (Invitrogen) was always used as the negative control. For libraries C, E, F and G, mutant T52D of (PF5-ilvC) was used as the positive control. The mutant T52D was a mutant of PF5-ilvC in which the threonine at position 52 was changed to aspartic acid. For library H, mutant C3B11 (R47F/S50A/T52D/v53W of PF5-ilvC) was used as the positive control.

Clones from archive plates were inoculated into the 96-deep well plates. Each well contained 3.0 μl of cells from thawed archive plates, 300 μl of the LB medium containing 100 μg/ml ampicillin and 0.02% (w/v) arabinose as the inducer. Cells were the grown overnight at 37° C. with 80% humidity while shaking (900 rpm), harvested by centrifugation (4000 rpm, 5 min at 25° C.). (Eppendorf centrifuge, Brinkmann Instruments, Inc. Westbury, N.Y.) and the cell pellet was stored at −20° C. for later analysis.

The assay substrate, (R,S)-acetolactate, was synthesized as described by Aulabaugh and Schloss (Aulabaugh and Schloss, Biochemistry, 29: 2824-2830, 1990): 1.0 g of 2-acetoxy-2-methyl-3-oxobutyric acid ethyl ester (Aldrich, Milwaukee, Wis.) was mixed with 10 ml NaOH (1.0 M) and stirred at room temperature. When the solution's pH became neutral, additional NaOH was slowly added until pH˜8.0 was maintained. All other chemicals used in the assay were purchased from Sigma.

The enzymatic conversion of acetolactate to α□β-dihydroxy-isovalerate by KARI was followed by measuring the disappearance of the cofactor, NADPH or NADH, from the reaction at 340 nm using a plate reader (Molecular Device, Sunnyvale, Calif.). The activity was calculated using the molar extinction coefficient of 6220 M⁻¹ cm⁻¹ for either NADPH or NADH. The stock solutions used were: K₂HFO₄ (0.2 M); KH₂PO₄ (0.2 M); EDTA (0.5 M); MgCl₂ (1.0 M); NADPH (2.0 mM); NADH (2.0 mM) and acetolactate (45 mM). The 100 ml reaction buffer mix stock containing: 4.8 ml K₂HPO₄, 0.2 ml KH₂PO₄, 4.0 ml MgCl₂, 0.1 ml EDTA and 90.9 ml water was prepared.

Frozen cell pellet in deep-well plates and BugBuster were warmed up at room temperature for 30 min at the same time. Each well of 96-well assay plates was filled with 120 μl of the reaction buffer and 20 μl of NADH (2.0 mM), 150 μl of BugBuster was added to each well after 30 min warm-up and cells were suspended using Genrnate (Tecan Systems Inc. San Jose, Calif.) by pipetting the cell suspension up and down (×5). The plates were incubated at room temperature for 20 min and then heated at 60° C. for 10 min. The cell debris and protein precipitates were removed by centrifugation at 4,000 rpm for 5 min at 25° C. An aliquot (50 μl) of the supernatant was transferred into each well of 96-well assay plates, the solution was mixed and the bubbles were removed by centrifugation at 4,000 rpm at 25° C. for 1 min. Absorbance at 340 nm was recorded as background, 20 μl of acetolactate (4.5 mM, diluted with the reaction buffer) was added to each well and mixed with shaking by the plate reader. Absorbance at 340 nm was recoded at 0, and 60 minutes after substrate addition. The difference in absorbance (before and after substrate addition) was used to determine the activity of the mutants. Mutants with higher KARI activity compared to the wild type were selected for re-screening.

About 5,000 clones were screened for library C and 360 top performers were selected for re-screen. About 92 clones were screened for library E and 16 top performers were selected for re-screening. About 92 clones were screened for library F and 8 top performers were selected for re-screening. About 92 clones were screened for library G and 20 top performers were selected for re-screening. About 8,000 clones were screened for library H and 62 top performers were selected for re-screening. The re-screening was described below as secondary assay.

Secondary Assay of Active Mutants

Cells containing pBad-ilvC and its mutants identified by high throughput screening were grown overnight, at 37° C., in 3.0 ml of the LB medium containing 100 μg/ml ampicillin and 0.02% (w/v) arabinose as the inducer while shaking at 250 rpm. The cells were then harvested by centrifugation at 18,000×g for 1 min at room temperature (Sigma micro-centrifuge model 1-15, Laurel, Md.). The cell pellets were re-suspended in 300 μl of BugBuster Master Mix (EMD Chemicals). The reaction mixture was first incubated at room temperature for 20 min and then heated at 60° C. for 10 min. The cell debris and protein precipitate were removed by centrifugation at 18,000×g for 5 min at room temperature.

The reaction buffer (120 μl) prepared as described above was mixed with either NADH or NADPH (20 μl) stock and cell extract (20 μl) in each well of a 96-well assay plate. The absorbance at 340 nm at 25° C. was recorded as background. Then 20 μl of acetolactate (4.5 mM, diluted with reaction buffer) was added each well and mixed with shaking by the plate reader. The absorbance at 340 nm at 0 min, 2 min and 5 min after adding acetolactate was recorded. The absorbance difference before and after adding substrate was used to determine the activity of the mutants. The mutants with high activity were selected for sequencing.

Five top performers from “Library C” were identified and sequenced (FIG. 4). The best performer was mutant R47F/S50A/T52D/V53W, which completely reversed the nucleotide specificity. The best performers from “Libraries E, F and G” were R47P, S50D and T52D respectively (FIG. 5). For “Library H”, 5 top performers were identified and sequenced (FIG. 6) and the best performer was R47P/S50G/T52D, which also completely reversed the nucleotide specificity. Enzymes containing activities higher than the background were considered positive.

KARI Enzyme Assay

KARI enzyme activity can be routinely measured by NADH or NADPH oxidation as described above, however to measure formation of the 2,3-dihydroxyisovalerate product directly, analysis of the reaction was performed using HPLC/MS.

Protein concentration of crude cell extract from Bugbuster lysed cells (as described above) was measured using the BioRad protein assay reagent (BioRad Laboratories, Inc., Hercules, Calif. 94547). A total of 0.5 micrograms of crude extract protein was added to a reaction buffer consisting of 100 mM HEPES-KOH, pH 7.5, 10 mM MgCl₂, 1 mM glucose-6-phosphate (Sigma-Aldrich), 0.2 Units of Leuconostoc mesenteroides glucose-6-phosphate dehydrogenase (Sigma-Aldrich), and various concentrations of NADH or NADPH, to a volume of 96 μL. The reaction was initiated by the addition of 4 μL of acetolactate to a final concentration of 4 mM and a final volume of 100 μL. After timed incubations at 30° C., typically between 2 and 15 min, the reaction was quenched by the addition of 10 μL of 0.5 M EDTA, pH 8.0 (Life Technologies, Grand Island, N.Y. 14072). To measure the K_(M) of NADH, the concentrations used were 0.03, 0.1, 0.3, 1, 3, and 10 mM.

To analyze for 2,3-dihydroxyisovalerate, the sample was diluted 10× with water, and 8.0 μl was injected into a Waters Acquity HPLC equipped with Waters SQD mass spectrometer (Waters Corporation, Milford, Mass.). The chromatography conditions were: flow rate (0.5 ml/mm), on a Waters Acquity HSS T3 column (2.1 mm diameter, 100 mm length). Buffer A consisted of 0.1% (v/v) in water, Buffer B was 0.1% formic acid in acetonitrile. The sample was analyzed using 1% buffer B (in buffer A) for 1 min, followed by a linear gradient from 1% buffer B at 1 min to 75% buffer B at 1.5 min. The reaction product, 2,3-dihydroxyiso-valerate, was detected by ionization at m/z=133, using the electrospray ionization devise at −30 V cone voltage. The amount of product 2,3-dihydroxyisovalerate was calculated by comparison to an authentic standard.

To calculate the K_(M) for NADH, the rate data for DHIV formation was plotted in Kaleidagraph (Synergy Software, Reading, Pa.) and fitted to the single substrate Michaelis-Menton equation, assuming saturating acetolactate concentration.

Example 1 Construction of Site-Saturation Gene Libraries to Identify Mutants Accepting NADH as Cofactor

Seven gene libraries were constructed (Table 2) using two steps: 1) synthesis of Megaprimers using commercially synthesized oligonucleotides described in Table 1; and 2) construction of mutated genes using the Megaprimers obtained in step 1. These primers were prepared using high fidelity pfu-ultra polymerase (Stratagene, La Jolla, Calif.) for one pair of primer containing one forward and one reverse primer. The templates for libraries C, E, F, G and H were the wild type of PF5_ilvc. The DNA templates for library N were those mutants having detectable NADH activity from library C while those for library O were those mutants having detectable NADH activity from library H. A 50 μl reaction mixture contained: 5.0 μl of 10× reaction buffer supplied with the pfu-ultra polymerase (Stratagene), 1.0 μl of 50 ng/μl template, 1.0 μl each of 10 pmol/μl forward and reverse primers, 1.0 μl of 40 mM dNTP mix (Promega, Madison, Wis.), 1.0 μl pfu-ultra DNA polymerase (Stratagene) and 39 μl water. The mixture was placed in a thin well 200 μl tube for the PCR reaction in a Mastercycler gradient equipment (Brinkmann Instruments, Inc. Westbury, N.Y.). The following conditions were used for the PCR reaction: The starting temperature was 95° C. for 30 sec followed by 30 heating/cooling cycles. Each cycle consisted of 95° C. for 30 sec, 54° C. for 1 min, and 70° C. for 2 min. At the completion of the temperature cycling, the samples were kept at 70° C. for 4 min more, and then held awaiting sample recovery at 4° C. The PCR product was cleaned up using a DNA cleaning kit (Cat #D4003, Zymo Research, Orange, Calif.) as recommended by the manufacturer.

TABLE 2 Gene libraries Library Targeted position(s) name Templates of Pf5_ilvC Primers used C PF5_ilvc 47, 50, 52 and 53 SEQ ID No: 1 and 2 E PF5_ilvc 47 SEQ ID No: 1 and 3 F PF5_ilvc 50 SEQ ID No: 1 and 4 G PF5_ilvc 52 SEQ ID No: 1 and 5 H PF5_ilvc 47, 50, and 52 SEQ ID No: 1 and 6 N Good mutants 53 SEQ ID NO: 20 from library C and 21 O Good mutants 53 SEQ ID NO: 20 from library H and 21

The Megaprimers were then used to generate gene libraries using the QuickChange II XL site directed mutagenesis kit (Catalog #200524, Stratagene, La Jolla Calif.). A 50 μl reaction mixture contained: 5.0 μl of 10× reaction buffer, 1.0 μl of 50 ng/μl template, 42 μl Megaprimer, 1.0 μl of 40 mM dNTP mix, 1.0 μl pfu-ultra DNA polymerase. Except for the Megaprimer and the templates, all reagents used here were supplied with the kit indicated above. This reaction mixture was placed in a thin well 200 μl-capacity PCR tube and the following reactions were used for the PCR: The starting temperature was 95° C. for 30 sec followed by 25 heating/cooling cycles. Each cycle consisted of 95° C. for 30 sec, 55° C. for 1 min, and 68° C. for 6 min. At the completion of the temperature cycling, the samples were kept at 68° C. for 8 min more, and then held at 4° C. for later processing. Dpn I restriction enzyme (1.0 μl) (supplied with the kit above) was directly added to the finished reaction mixture, enzyme digestion was performed at 37° C. for 1 h and the PCR product was cleaned up using a DNA cleaning kit (Zymo Research). The cleaned PCR product (10 μl) contained mutated genes for a gene library.

The cleaned PCR product was transformed into an electro-competent strain of E. coli Bw25113 (ΔilvC) using a BioRad Gene Pulser II (Bio-Rad Laboratories Inc., Hercules, Calif.). The transformed clones were streaked on agar plates containing the LB medium and 100 μl ampicillin (Cat #L1004, Teknova Inc. Hollister, Calif.) and incubated at 37° C. overnight. Dozens of clones were randomly chosen for DNA sequencing to confirm the quality of the library,

TABLE 3 Lis tof some mutants having NADH activity identified from saturation libraries Mutant Position 47 Position 50 Position 52 Position 53 SD2 R47Y S50A T52H V53W SB1 R47Y S50A T52G V53W SE1 R47A S50W T52G V53W SH2 R47N S50W T52N V53W SB2 R47I T52G V53W SG1 R47Y T52G V53W SB3 R47G S50W T52G V53W SE2 R47P S50E T52A V53W SD3 R47L S50W T52G V53W C2A6 R47I S50G T52D V53W C3E11 R47A S50M T52D V53W C3A7 R47Y S50A T52D V53W C3B11 R47F S50A T52D V53W C4A5 R47Y S50A T52S V53W C3B12 R47I T52D V53W C4H7 R47I T52S V53W C1D3 R47G S50M T52D V53W C4D12 R47C S50W T52G V53W C1G7 R47P S50G T52D V53W C2F6 R47P S50V T52D V53W C1C4 R47P S50E T52S V53W 6924F9 R47P S50G T52D 6881E11 R47P S50N T52C 6868F10 R47P T52S 6883G10 R47P S50D T52S 6939G4 R47P S50C T52D 11463D8 R47P S50F T52D 9667A11 R47N S50N T52D V53A 9675C8 R47Y S50A T52D V53A 9650E5 R47N S50W T52G V53H 9875B9 R47N S50N T52D V53W 9862B9 R47D S50W T52G V53W 9728G11 R47N S50W T52G V53W 11461D8 R47F S50A T52D V53A 11461A2 R47P S50F T52D V53I

Example 2 Construction of Error Prone PCR Library

Mutants obtained in Example 1, with mutations in their cofactor binding sites which exhibited relatively good NADH activities, were used as the DNA template to prepare the error prone (ePCR) libraries using the GeneMorph H kit (Stratagene) as recommended by the manufacturer. All the epPCR libraries target the N-terminal (which contains the NADPH binding site) of PF5_KARI. The forward primer (SED ID No: 20) and the reverse primer (SED ID No: 22) were used for all ePCR libraries.

The DNA templates for the n^(th) epPCR library were mutants having good NADH activity from the (n−1)^(th) epPCR library. The templates of the first epPCR library were mutants having relatively good NADH activity from libraries N and O. The mutations rate of library made by this kit was controlled by the amount of template added in the reaction mixture and the number of amplification cycles. Typically, 1.0 ng of each DNA template was used in 100 μl of reaction mixture. The number of amplification cycles was 70. The following conditions were used for the PCR reaction: The starting temperature was 95° C. for 30 sec followed by 70 heating/cooling cycles. Each cycle consisted of 95° C. for 30 sec, 55° C. for 30 min, and 70° C. for 2 min. After the first 35 heating/cooling cycles finished, more dNTP and Mutazyme II DNA polymerase were added. The PCR product was cleaned up using a DNA cleaning kit (Cat #D4003, Zymo Research, Orange, Calif.) as recommended by the manufacturer. The cleaned PCR product was treated as Megaprimer and introduced into the vector using the Quickchange kit as described in Example 1. Table 4 below lists the KARI mutants obtained and the significant improvement observed in their NADH binding ability. The K_(M) was reduced from 1100 μM for mutant C3B11 to 50 μM for mutant 12957G9.

TABLE 4 List of some mutants with their measured K_(M) values NADH Mutant Mutation Locations K_(M) (μM) C3B11 R47F/S50A/T52D/V53W 1100 SB3 R47G/S50W/T52G/V53W 500 11518B4 R47N/S50N/T52D/V53A/A156V 141 11281G2 R47N/S50N/T52D/V53A/A156V/L165M 130 12985F6 R47Y/S50A/T52D/V53A/L61F/A156V 100 13002D8 R47Y/S50A/T52D/V53A/L61F/A156V/G170A 68 12957G9 Y24F/R47Y/S50A/T52D/V53A/L61F/G170A 50 12978D9 R47Y/S50A/T52D/V53A/L61F/Q115L/A156V 114

Example 3 Identification of Amino Acids PCR Cofactor Specificity Switching Using Bioinformatic Tools

To discover if naturally existing KARI sequences could provide clues for amino acid positions that should be targeted for mutagenesis, multiple sequence alignment (MSA) using PF5_KARI, its close homolog PAO1_KARI and three KARI sequences with measureable NADH activity, i.e., B. Cereus ilvC1 and ilvC2 and spinach KARI were performed (FIG. 8). Based on the multiple sequence alignment, positions 33, 43, 59, 61, 71, 80, 101, and 119 were chosen for saturation mutagenesis. Saturation mutagenesis on all of these positions was performed simultaneously using the QuickChange II XL site directed mutagenesis kit (Catalog #200524, Stratagene, La Jolla Calif.) with the manufacturer's suggested protocol. Starting material for this mutagenesis was a mixed template consisting of the mutants already identified in Example 2, Table 4. The primers used are listed in Table 5. The library of mutants thus obtained were named “library Z”. Mutants with good NADH activity from this library were identified using high throughput screening and their KARI activity and the K_(M) for NADH were measured as described above. These mutants (Table 6) possess much lower K_(M)s for NADH compared to the parent templates (Table 4). A Megaprimer, using primers (SEQ ID Nos. 20 and 58), was created and mutations at positions 156 and 170 were eliminated. Further screening of this set of mutants identified mutant 3361G8 (SEQ ID NO: 67)(Table 7). The hits from library Z were further subjected to saturation mutagenesis at position 53 using primers (SEQ ID Nos. 20 and 21), and subsequent screening identified the remaining mutants in Table 7. As shown in Table 7 the new mutants possessed much lower K_(M) for NADH (e.g., 4.0 to 5.5 μM) compared to mutants listed in Table 6 (e.g., 14-40 μM).

TABLE 5 Primers for Example 5 Targeted position(s) of Pf5_ilvC Primers  33 pBAD-405-C33_090808f: GCTCAAGCANNKAACCTGAAGG (SEQ ID NO: 49) pBAD-427-C33_090808r: CCTTCAGGTTKNNTGCTTGAGC (SEQ ID NO: 50)  43 pBAD-435-T43_090808f: GTAGACGTGNNKGTTGGCGTG (SEQ ID NO: 51) pBAD-456-T43_090808r: CAGGCCAACKNNCACGTCTAC (SEQ ID NO: 52)  59 and 61 pBAD-484-H59L61_090808f: CTGAAGCCNNKGGCNNKAAAGTGAC (SEQ ID NO: 53) pBAD-509-H59L61_090808r: GTCACTTTKNNGCCKNNGGCTTCAG (SEQ ID NO: 54)  71 pBAD-519-A71_090808f: GCAGCCGTTNNKGGTGCCGACT (SEQ ID NO: 55) pBAD-541-A71_090808r: AGTCGGCACCKNNAACGGCTGC (SEQ ID NO: 56)  80 pBAD-545-T80_090808f: CATGATCCTGNNKCCGGACGAG (SEQ ID NO: 57) pBAD-567-T80_090808r: CTCGTCCGGKNNCAGGATCATG (SEQ ID NO: 58) 101 pBAD-608-A101_090808f: CAAGAAGGGCNNKACTCTGGCCT (SEQ ID NO: 59) pBAD-631-A101_090808r: AGGCCAGAGTKNNGCCCTTCTTG (SEQ ID NO: 60) 119 pBAD-663-R119_090808f: GTTGTGCCTNNKGCCGACCTCG (SEQ ID NO: 61) pBAD-685-R119_090808r: CGAGGTCGGCKNNAGGCACAAC (SEQ ID NO: 62)

TABLE 6 List of some mutants with their measured K_(M) values (positions to be mutated in this library were identified by bioinformatic tools) NADH Mutant Mutation Locations K_(M) (μM) ZB1 Y24F/R47Y/S50A/T52D/V53A/L61F/A156V (SEQ ID NO: 24) 40 ZF3 Y24F/C33L/R47Y/S50A/T52D/V53A/L61F (SEQ ID NO: 25) 21 ZF2 Y24F/C33L/R47Y/S50A/T52D/V53A/L61F/A156V (SEQ ID NO: 26) 17 ZB3 Y24F/C33L/R47Y/S50A/T52D/V53A/L61F/G170A (SEQ ID NO: 27) 17 Z4B8 C33L/R47Y/S50A/T52D/V53A/L61F/T80I/A156V (SEQ ID NO: 28) 14

TABLE 7 Mutants further optimized for improved K_(M) (for NADH) NADH Mutant Mutation Locations K_(M) (μM) 3361G8 C33L/R47Y/S50A/T52D/V53A/L61F/T80I 5.5 (SEQ ID NO: 67) 2H10 Y24F/C33L/R47Y/S50A/T52D/V53I/L61F/ 5.3 T80I/A156V (SEQ ID NO : 68) 1D2 Y24F/R47Y/S50A/T52D/V53A/L61F/T80I/ 4.1 A156V (SEQ ID NO: 69) 3F12 Y24F/C33L/R47Y/S50A/T52D/V53A/L61F/ 4.0 T80I/A156V (SEQ ID NO: 70) 3361E1 Y24F/R47Y/S50A/T52D/V53I/L61F 4.5 (SEQ ID NO : 84)

Further analyses using bioinformatic tools were therefore performed to expand the mutational sites to other KARI sequences as described below.

Sequence Analysis

Members of the protein family of ketol-acid reducoisomorase (KARI) were identified through BlastP searches of publicly available databases using amino acid sequence of Pseudomonas fluorescens PF5 KARI (SEQ ID NO:17) with the following search parameters: E value=10, word size=3, Matrix=Blosum62, and Gap opening=11 and gap extension=1, E value cutoff of 10⁻³. Identical sequences and sequences that were shorter than 260 amino acids were removed. In addition, sequences that lack the typical GxGXX(G/A) motif involved in the binding of NAD(P)H in the N-terminal domain were also removed. These analyses resulted in a set of 692 KARI sequences.

A profile HMM was generated from the set of the experimentally verified Class I and Class II KARI enzymes from various sources as described in Table 8. Details on building, calibrating, and searching with this profile HMM are provided below. Any sequence that can be retrieved by HMM search using the profile HMM for KARI at E-value above 1E⁻³ is considered a member of the KARI family. Positions in a KARI sequence aligned to the following in the profile HMM nodes (defined below in the section of profile HMM building) are claimed to be responsible for NADH utilization: 24, 33, 47, 50, 52, 53, 61, 80, 115, 156, and 170 (the numbering is based on the sequences of Pseudomonas fluorescens PF5 KARI).

Preparation of Profile HMM

A group of KARI sequences were expressed in E. coli and have been verified to have KARI activity These KARIs are listed in Table 6. The amino acid sequences of these experimentally verified functional KARIs were analyzed using the HMMER software package (The theory behind profile HMMs is described in R. Durbin, S. Eddy, A. Krogh, and G. Mitchison, Biological sequence analysis: probabilistic models of proteins and nucleic acids, Cambridge University Press, 1998; Krogh et al., J. Mol. Biol. 235:1501-1531, 1994), following the user guide which is available from HMMER (Janelia Farm Research Campus, Ashburn, Va.). The output of the HMMER software program is a profile Hidden Markov Model (profile HMM) that characterizes the input sequences. As stated in the user guide, profile HMMs are statistical descriptions of the consensus of a multiple sequence alignment. They use position-specific scores for amino acids (or nucleotides) and position specific scores for opening and extending an insertion or deletion. Compared to other profile based methods, HMMs have a formal probabilistic basis. Profile HMMs for a large number of protein families are publicly available in the PFAM database (Janelia Farm Research Campus, Ashburn, Va.).

The profile HMM was built as follows:

Step 1. Build a Sequence Alignment

The 25 sequences for the functionally verified KARIs listed above were aligned using Clustal W (Thompson, J. D., Higgins, D. G., and Gibson T. J., Nuc. Acid Res. 22: 4673 4680, 1994) with default parameters. The alignment is shown in FIG. 9.

TABLE 8 25 Experimentally verified KARI enzymes SEQ GI ID Number Accession NO: Microorganism 70732562 YP_262325.1 17 Pseudomonas fluorescens Pf-5 15897495 NP_342100.1 13 Sulfolobus solfataricus P2 18313972 NP_560639.1 14 Pyrobaculum aerophilum str. IM2 76801743 YP_326751.1 30 Natronomonas pharaonis DSM 2160 16079881 NP_390707.1 31 Bacillus subtilis subsp. subtilis str. 168 19552493 NP_600495.1 32 Corynebacterium glutamicum ATCC 13032 6225553 O32414 33 Phaeospririlum molischianum 17546794 NP_520196.1 15 Ralstonia solanacearum GMI1000 56552037 YP_162876.1 34 Zymomonas mobilis subsp. mobilis ZM4 114319705 YP_741388.1 35 Alkalilimnicola ehrlichei MLHE-1 57240359 ZP_00368308.1 36 Campylobacter lari RM2100 120553816 YP_958167.1 37 Marinobacter aquaeolei VT8 71065099 YP_263826.1 38 Psychrobacter arcticus 273-4 83648555 YP_436990.1 39 Hahella chejuensis KCTC 2396 74318007 YP_315747.1 40 Thiobacillus denitrificans ATCC 25259 67159493 ZP_00420011.1 41 Azotobacter vinelandii AvOP 66044103 VP_233944.1 42 Pseudomonas syringae pv. syringae B728a 28868203 NP_790822.1 43 Pseadomonas syringae pv. tomato str. DC3000 26991362 NP_746787.1 44 Pseudomonas putida KT2440 104783656 VP_610154.1 45 Pseudomonas entomophila L48 146306044 VP_001186509.1 46 Pseudomonas mendocina ymp 15599888 NP_253382.1 16 Pseudomonas aeruginosa PAO1 42780593 NP_977840.1 47 Bacillus cereus ATCC 10987 42781005 NP_978252.1 48 Bacillus cereus ATCC 10987 266346 Q01292 18 Spinacia oleracea

Step 2. Build a Profile HMM

The hmmbuild program was run on the set of aligned sequences using default parameters. hmmbuild reads the multiple sequence alignment file, builds a new profile HMM, and saves the profile HMM to file. Using this program an un-calibrated profile was generated from the multiple sequence alignment for twenty-four experimentally verified KARIs as described above.

The following information based on the HMMER software user guide gives some description of the way that the hmmbuild program prepares a profile HMM. A profile HMM is a linear state machine consisting of a series of nodes, each of which corresponds roughly to a position (column) in the multiple sequence alignment from which it is built. If gaps are ignored, the correspondence is exact, i.e., the profile HMM has a node for each column in the alignment, and each node can exist in one state, a match state. The word “match” here implies that there is a position in the model for every position in the sequence to be aligned to the model. Gaps are modeled using insertion (I) states and deletion (D) states. All columns that contain more than a certain fraction x of gap characters will be assigned as an insert column. By default, x is set to 0.5. Each match state has an I and a D state associated with it. HMMER calls a group of three states (M/D/I) at the same consensus position in the alignment a “node”.

A profile HMM has several types of probabilities associated with it. One type is the transition probability—the probability of transitioning from one state to another. There are also emissions probabilities associated with each match state, based on the probability of a given residue existing at that position in the alignment. For example, for a fairly well-conserved column in an alignment, the emissions probability for the most common amino acid may be 0.81, while for each of the other 19 amino acids it may be 0.01.

A profile HMM is completely described in a HMMER2 profile save file, which contains all the probabilities that are used to parameterize the HMM. The emission probabilities of a match state or an insert state are stored as log-odds ratio relative to a null model: log₂ (p_x)/(null_x). Where p_x is the probability of an amino acid residue, at a particular position in the alignment, according to the profile HMM and null_x is the probability according to the Null model. The Null model is a simple one state probabilistic model with pre-calculated set of emission probabilities for each of the 20 amino acids derived from the distribution of amino acids in the SWISSPROT release 24. State transition scores are also stored as log odds parameters and are proportional to log₂(t_x). Where t_x is the transition probability of transiting from one state to another state.

Step 3. Calibrate the Profile HMM

The profile HMM was read using hmmcalibrate which scores a large number of synthesized random sequences with the profile (the default number of synthetic sequences used is 5,000), fits an extreme value distribution (EVD) to the histogram of those scores, and re-saves the HMM file now including the EVD parameters. These EVD parameters (μ and λ) are used to calculate the E-values of bit scores when the profile is searched against a protein sequence database. Hmmcalibrate writes two parameters into the HMM file on a line labeled “EVD”: these parameters are the μ (location) and λ (scale) parameters of an extreme value distribution (EVD) that best fits a histogram of scores calculated on randomly generated sequences of about the same length and residue composition as SWISS-PROT. This calibration was done once for the profile HMM.

The calibrated profile HMM for the set of KARI sequences is provided appended hereto as a profile HMM Excel chart (Table 9). In the main model section starting from the HMM flag line, the model has three lines per node, for M nodes (where M is the number of match states, as given by the LENG line). The first line reports the match emission log-odds scores: the log-odds ratio of emitting each amino acid from that state and from the Null model. The first number if the node number (1..M). The next K numbers for match emission scores, one per amino acid. The highest scoring amino acid is indicated in the parenthesis after the node number. These log-odds scores can be converted back to HMM probabilities using the null model probability. The last number on the line represents the alignment column index for this match state. The second line reports the insert emission scores, and the third line reports on state transition scores: M→M, M→I, M→D; I→M; I→I; D→M, D→D; B→M; M→E.

Step 4. Test the Specificity and Sensitivity of the Built Profile HMMs

The Profile HMM was evaluated using hmmsearch, which reads a Profile HMM from hmmfile and searches a sequence file for significantly similar sequence matches. The sequence file searched contained 692 sequences (see above). During the search, the size of the database (Z parameter) was set to 1 billion. This size setting ensures that significant E-values against the current database will remain significant in the foreseeable future. The E-value cutoff was set at 10.

An hmmersearch, using hmmsearch, with the profile HMM generated from the alignment of the twenty-five KARIs with experimentally verified function, matched all 692 sequences with an E value<10⁻³. This result indicates that members of the KARI family share significant sequence similarity. A hmmersearch with a cutoff of E value 10⁻³ was used to separate KARIs from other proteins.

Step 5. Identify Positions that are Relevant for NAD(P)H Utilization.

Eleven positions have been identified in KARI of Pseudomonas fluorescens Pf-5 that switches the cofactor from NADPH to NADH. Since the KARI sequences share significant sequence similarity (as described above), it can be reasoned that the homologous positions in the alignment of KARI sequences should contribute to the same functional specificity. The profile HMM for KARI enzymes has been generated from the multiple sequence alignment which contains the sequence of Pseudomonas fluorescens Pf5 KARI. The eleven positions in the profile HMM representing the columns in the alignment which correspond to the eleven cofactor switching positions in Pseudomonas fluorescens Pf-5 KARI are identified as positions 24, 33, 47, 50, 52, 53, 61, 80, 115, 156, and 170. The lines corresponding to these positions in the model file are highlighted in yellow in Table 9.

For any query sequence, hmm search is used to search the profile HMM for KARI against the query sequence and the alignment of the query to the HMM is recorded in the output file. In the alignment section of the output, the top line is the HMM consensus. The amino acid shown for the consensus is the highest probability amino acid at that position according to the HMM (not necessarily the highest scoring amino acid). The center line shows letters for “exact” matches to the highest probability residue in the HMM, or a “+” when the match has a positive score. The third line shows the sequence itself. The positions in the query sequence that are deemed as relevant for cofactor switching are identified as those that are aligned to these eleven nodes in the profile HMM as described above. An example of the alignment of Pseudomonas fluorescens Pf-5 KARI to the profile HMM of KARI is shown in FIG. 10 and the eleven positions that are responsible for cofactor switching are shaded in grey.

Example 4 Construction of a Site-Saturation Gene Library PCR Complete Cofactor Switching to NADH

To construct the site-saturation gene library for KARI mutants, mutants 3361E1, 3361G8, 102, 2H10, 3F12, & Z4B8 (see Example 3, Tables 6 and 7) were used as templates. The library was constructed using QuickChange kit (Cat #200524, Stratagene, La Jolla, Calif.). The concentration of each mutant in the template mixture was 5.0 ng/μl. The two primers (2.5 nM) introducing saturation mutagenesis at positions 47, 50, 52 and 53, were PF5_(—)4Mt111008.f (SEQ ID NO: 71) and PF5_(—)4Mt111008.r (SEQ ID NO: 72).

The PCR Reaction Mixture Contained:

10 × reaction buffer 5.0 μl PF5_4Mt111008.f 2.0 μl PF5_4Mt111008.r 2.0 μl 50 × dNTP 1.0 μl DNA Template 1.0 μl PfuUltra 1.0 μl Water  38 μl

The PCR Reaction Program Was:

1) 95° C.  30 sec 2) 95° C.  30 sec 3) 55° C. 1.0 min 4) 68° C. 6.0 min 5) Go to step (2) Repeat 35 times 6) 68° C. 8.0 min 7) 4° C. press Enter

The mixture was placed in a thin well 200 μl tube for the PCR reaction in a Mastercycler gradient equipment (Brinkmann Instruments, Inc. Westbury, N.Y.). After the PCR reaction, 1.0 μl Dpn I restriction enzyme (supplied with the kit above) was directly added into the PCR reaction mixture, which was then incubated at 37° C. for 1 h to remove the DNA templates. The Dpn I digested PCR product was cleaned up by the Zymo DNA clearance kit (Cat #D4003, Zymo Research, Orange, Calif.) as recommended by the manufacturer.

The cleaned PCR product was transformed into an electro-competent strain of E. coli Bw25113 (ΔilvC) using a BioRad Gene Pulser II (Bio-Rad Laboratories Inc., Hercules, Calif.). The transformed clones were streaked on agar plates containing the LB medium and 100 μg/ml ampicillin (Cat #L1004, Teknova Inc. Hollister, Calif.) and incubated at 37° C. overnight. Dozens of clones were randomly chosen for DNA sequencing to confirm the quality of the library. Several mutants identified in this library (Table 10 and FIG. 11) had very low NADPH activity while they had good NADH activity. Their cofactor consumption is listed in Table 11 (The data was based on three parallel measurements). “Negative” in the following Tables refers to an empty pBAD vector without the KARI gene.

TABLE 10 List of some of the mutants identified in Example 1 Mutant Mutation Locations JB1C6 Y24F/C33L/R47H/S50D/T52Y/V53Y/L61F/T80I/A156V 16445E4 C33L/R47P/S50V/T52D/V53G/L61F/T80I/A156V 16468D7 Y24F/C33L/R47T/S50I/T52D/V53R/L61F/T80I/A156V 16469F3 C33L/R47E/S50A/T52D/V53A/L61F/T80I

TABLE 11 The cofactor consumption of some mutants following a 5 min reaction (decrease in OD₃₄₀ nm) 0.2 mM NADH 0.2 mM NADPH Mutants average stdev average stdev JB1C6 −0.232 0.127 −0.019 0.009 16445E4 −0.152 0.057 −0.013 0.001 16468D7 −0.153 0.012 −0.039 0.020 16469F3 −0.054 0.069 −0.025 0.016 Z4B8 −0.178 0.042 −0.170 0.013 PF5_WT −0.078 0.014 −0.320 0.024 Negative −0.061 0.029 −0.015 0.014

Example 5 Construction of a Domain Swapping Library

In this Example the beneficial mutations outside the cofactor binding sites and the beneficial mutations within the cofactor binding sites were combined to create a domain swapping library,

Mutants, which had mutations in the cofactor binding site and exhibited only NADH activity (SE1, SB3, SE2, SD3, C2F6, C3B11, C4D12, 9650E5, 9667A11, 9862B9, 9875B9, 11461D8, 11463D6, 11518B4, SEQ ID NOs: 85-98), were used to obtain additional beneficial mutations in the cofactor binding site. Two primers, pBAD_(—)230f (SEQ ID NO: 73) and pBAD601_(—)921308r (SEQ ID NO: 74), were used to amplify the mutants listed in Table 12. PCR reagents used were from Invitrogen (Cat #10572-014, Invitrogen, Carlsbad, Calif.).

The PCR Reaction Mixture Contained:

PCR SuperMix 180 μl  pBAD_230.f (18 nM) 5.0 μl pBAD_601_021308r (10 nM) 9.0 μl Template mix (5.0 ng/μl) 6.0 μl

The PCR Reaction Program Was:

(1) 95° C. 30 sec (2) 95° C. 20 sec (3) 55° C. 20 sec (4) 72° C. 60 sec (5) Go to step (2) repeat 35 times (6) 72° C.  4 min (7) 4° C. press enter

After the PCR reaction, 1.0 μl Dpn I restriction enzyme (supplied with the kit above) was directly added into the PCR reaction mixture, which was then incubated at 37° C. for 1 h to remove the DNA templates. The Dpn I digested PCR product was cleaned up by the Zymo DNA clearance kit (Cat #D4003, Zymo Research, Orange, Calif.) as recommended by the manufacturer and 42 μl cleaned DNA product containing beneficial mutations in the cofactor binding sites obtained was designated as Megaprimer.

The Megaprimers thus obtained were then used to generate the domain swapping library using the QuickChange II XL site directed mutagenesis kit (Catalog #200524, Stratagene, La Jolla Calif.). The templates used in Example 4 were also used in this experiment. A 50 μl reaction mixture containing: 5.0 μl of 10× reaction buffer, 1.0 μl of 5.0 ng/μl template, 42 μl Megaprimer, 1.0 μl of 40 mM dNTP mix, 1.0 μl pfu-ultra DNA polymerase was prepared. Except for the Megaprimer and the templates, all reagents used here were supplied with the purchased kit. This reaction mixture was placed in a thin well 200 μl-capacity PCR tube and the following reactions were used for the PCR. The starting temperature was 95° C. for 30 sec followed by 30 heating/cooling cycles. Each cycle consisted of 95° C. for 30 sec, 55° C. for 1 min, and 68° C. for 6 min. At the completion of the temperature cycling, the samples were kept at 68° C. for 8 min, and then stored at 4° C. for later processing. Dpn I restriction enzyme (1.0 μl) (supplied with the kit above) was directly added to the finished reaction mixture, enzyme digestion was performed at 37° C. for 1 h and the PCR product was cleaned up using a DNA cleaning kit (Zymo Research). The cleaned PCR product (10 μl) contained mutated genes for a gene library.

The mutated genes were transformed into an electro-competent strain of E. coli Bw25113 (ΔilvC) using a BioRad Gene Pulser II (Bio-Rad Laboratories Inc., Hercules, Calif.). The transformed clones were streaked on LB agar plates containing 100 μg/ml ampicillin (Cat #L1004, Teknova Inc. Hollister, Calif.) and incubated at 37° C. overnight. Dozens of clones were randomly chosen for DNA sequencing to confirm the quality of the library.

This library yielded many mutants with high NADH activity (low K_(M) for NADH), which also had very low NADPH activity. (Table 12 and FIG. 12). Their cofactor consumption is also shown in Table 13 (The data was based on three parallel measurements).

TABLE 12 Mutants with improved K_(M) (for NADH) obtained from the domain swapping library NADH Mutant Mutation Locations K_(M) (μM) JEA1 Y24F/C33L/R47P/S50F/T52D/L61F/T80I/A156V 9.1 JEG2 Y24F/C33L/R47F/S50A/T52D/V53A/L61F/T80I/ 9.4 A156V JEG4 Y24F/C33L/R47N/S50N/T52D/V53A/L61F/T80I/ 9.6 A156V JEA7 Y24F/C33L/R47P/S50N/T52D/V53A/L61F/T80I/ 10.6 A156V JED1 C33L/R47N/S50N/T52D/V53A/L61F/T80I/A156V 11.0

TABLE 13 The cofactor consumption of some mutants after 5 min reaction (decrease in OD₃₄₀ nm) 0.2 mM NADH 0.2 mM NADPH Mutants average stdev average stdev JEA1 −0.285 0.030 −0.110 0.025 JED1 −0.287 0.032 −0.074 0.014 JEG2 −0.261 0.009 −0.078 0.009 JEG4 −0.227 0.016 −0.050 0.016 JEA7 −0.205 0.079 −0.038 0.009 Z4B8 −0.178 0.042 −0.170 0.013 PF5_WT −0.078 0.014 −0.320 0.024 Negative −0.061 0.029 −0.015 0.014

Example 6 Thermostability of PF5-ILVC and its Mutants

The wildtype PF5-ILVC and various cells containing mutated pBad-ilvC were grown overnight at 37° C. in 25 ml of the LB medium containing 100 μg/ml ampicillin and 0.02% (w/v) arabinose inducer while shaking at 250 rpm. The cells were then harvested by centrifugation at 18,000×g for 1 min at room temperature and the cell pellets were re-suspended in 300 μl of BugBuster Master Mix (EMD Chemicals). The reaction mixture was first incubated at room temperature for 20 min and aliquots of this cell mixture (e.g. 50 μl) were incubated at different temperatures (from room temperature to 75° C.) for 10 min. The precipitate was removed by centrifugation at 18,000×g for 5 min at room temperature. The remaining activity of the supernatant was analyzed as described above. As shown in FIG. 7, pBad-ilvC was very stable with T₅₀ at 68° C. (T₅₀ is the temperature, at which 50% of protein lost its activity after 10 min incubation).

The thermostability of PF5-ilvC allowed destruction of most of the other non-KARI NADH oxidation activity within these cells, reducing the NADH background consumption and thus facilitating the KARI activity assays. This heat treatment protocol was used in all screening and re-screening assays. The mutants thus obtained were all thermostable which allowed easier selection of the desirable mutants.

Example 7 Stoichiometric Production of 2,3-Dihydroxyisovalerate by KARI During Consumption of NADH or NADPH as Cofactors

Screening and routine assays of KARI activity rely on the 340 nm absorption decrease associated with oxidation of the pyridine nucleotides NADPH or NADH. To insure that this metric was coupled to the formation of the reaction product (i.e., 2,3-dihydroxyisovalerate), oxidation of both pyridine nucleotide and formation of 2,3-dihydroxyisovalerate were measured in the same samples.

The oxidation of NADH or NADPH was measured at 340 nm in a 1 cm path length cuvette on a Agilent model 8453 spectrophotometer (Agilent Technologies, Wilmington Del.). Crude cell extract (0.1 ml) prepared as described above containing either wild type PF5 KARI or the C3B11 mutant, was added to 0.9 ml of K-phosphate buffer (10 mM, pH 7.6), containing 10 mM MgCl₂, and 0.2 mM of either NADPH or NADH. The reaction was initiated by the addition of acetolactate to a final concentration of 0.4 mM. After 10-20% decrease in the absorption (about 5 min), 50 μl of the reaction mixture was rapidly withdrawn and added to a 1.5 ml Eppendorf tube containing 10 μl 0.5 mM EDTA to stop the reaction and the actual absorption decrease for each sample was accurately recorded. Production of 2,3-dihydroxyisovalerate was measured and quantitated by HPLC/MS as described above.

The coupling ratio is defined by the ratio between the amount of 2,3-dihydroxyisovalerate (DHIV) produced and the amount of either NADH or NADPH consumed during the experiment. The coupling ratio for the wild type enzyme (PF5-ilvC), using NADPH, was 0.98 DHIV/NADPH, while that for the mutant (C3B11), using NADH, was on average around 1.10 DHIV/NADPH underlining the high activity of the mutant enzyme to consume NADH and produce DHIV.

TABLE 9 HMMER2.0 [2.2 g] File format version: a unique identifier for this save file format. NAME Functionally Verified KARIs Name of the profile HMM LENG 354 Model length: the number of match states in the model. ALPH Amino Symbol alphbet: This determines the symbol alphabet and the size of the symbol emission probability distributions. IAmino, the alphabet size is set to 20 and the symbol alphabet to “ACDEFGHIKLMNPQRSTVWY” (alphabetic order). MAP yes Map annotation flag: If set to yes, each line of data for the match state/consensus column in the main section of the file is followed by an extra number. This number gives the index of the alignment column that the match state was made from. This information provides a “map” of the match states (1 . . . M) onto the columns of the alignment (1.alen). It is used for quickly aligning the model back to the original alignment, e.g. when using hmmalign-mapali. COM hmmbuild-n Functionally Verified KARIs Command line for every HMMER command that modifies the save file: This one means that hmmbuild (default patrameters) was applied to exp-KARI.hmm exp-KARI_mod.aln generate the save file. COM hmmcalibrate exp-KARI.hmm Command line for every HMMER command that modifies the save file: This one means that hmmcalibrate (default parametrs) was applied to the save profile. NSEQ 25 Sequence number: the number of sequences the HMM was trained on DATE Mon Dec 8 17:34:51 2008 Creation date: When was the save file was generated. XT −8455 −4 −1000 −1000 −8455 −4 −8455 −4 Eight “special” transitions for controlling parts of the algorithm-specific parts of the Plan7 model. The null probability used to convert these back to model probabilities is 1.0. The order of the eight fields is N->B, N->N, E->C, E->J, C->T, C->C, J->B, J->J. NULT −4 −8455 The transition probability distribution for the null model (single G state). NULE 595 −1558 85 338 −294 453 −1158 197 249 902 −1085 −142 −21 The extreme value distribution parameters μ and lambda respectively; both floating point values. These values are set when the model is −313 45 531 201 384 −1998 −644 calibrated with hmmcalibrate. They are used to determine E-values of bit scores. EVD −333.712708 0.110102 A C D E F G H I K Position in HMM m->m m->i m->d i->m i->i d->m d->d b->m m->e L M N P Q R S T V W Y alignment −650 * −1463  1(Q) −648 −1356 −136 −44 −1453 −1166 −219 −1455 321 −1417 −911 −227 −1496 3263 122 −643 −684 −1239 −1542 −1030 7100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −38 −5840 −6882 −894 −1115 −701 −1378 −650 *  2(M) −4231 −3929 −5216 −5402 −3438 −4370 −4528 −3232 −5113 −2613 5320 −5052 −4790 −4977 −4823 −4692 −4459 −3629 −4103 −4017 7200% — −147 −501 232 42 −382 397 104 −625 209 −467 −722 276 396 44 95 361 121 −368 −296 −251 — −3303 −3318 −325 −3473 −136 −701 −1378 * *  3(F) −1308 −1104 −2227 −2120 3516 −2093 −244 −196 −1891 64 66 −1626 −2278 −1503 −1798 −1617 −1350 −389 305 1335 8600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −38 −5840 −6882 −894 −1115 −943 −1060 * *  4(A) 1616 −1744 1125 33 −2015 −1540 −262 −1686 937 −1765 −911 −252 −1658 154 −383 −488 640 −3 −2038 −1421 8700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −901 −7402 −1125 −894 −1115 −2352 −314 * *  5(C) −346 2578 1084 −712 2092 −1540 −384 −167 −624 −482 125 −731 −1705 −451 −883 −631 −338 −50 −774 −133 8800% — −149 −500 235 43 −381 398 106 −626 210 −466 −721 275 394 45 96 359 118 −369 −295 −249 — −1009 −1006 −7567 −131 −3527 −1916 −444 * *  6(S) 800 −586 −1937 −1415 −821 −1740 −954 1279 −1204 −584 19 −1258 −1964 −1013 −1358 1715 −476 1117 −1320 −938 9000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −17 −6953 −7995 −894 −1115 −146 −3378 * *  7(K) −956 −2411 −803 501 −2743 −1919 −558 −2483 2435 −2420 −1502 57 −2010 1146 458 829 224 −2040 −2577 −1913 9100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  8(V) −2472 −2010 −5089 −4702 −2534 −4789 −4391 2241 −4574 −151 −1318 −4442 −4600 −4417 −4628 −4080 −82 3023 −3952 −3510 9200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  9(Y) −4673 −3685 −5210 −5505 2423 −5069 −1332 −3424 −5065 −392 −2838 −3726 −4920 −3835 −4458 −4313 −4533 −3643 −581 4349 9300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  10(Y) −2170 −2625 −2489 −2097 −1555 −2986 −1481 −2628 906 −2674 −2098 −2051 −3206 −1513 −1078 −2258 1039 −2435 −2009 4185 9400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  11(D) −2498 −4412 3500 1042 −4581 −2437 −1765 −4500 733 −4361 −3682 515 −2961 −1429 −2799 −2158 −2558 −3974 −4550 −3541 9500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  12(K) 11 −2371 348 819 −2692 −535 −527 −2443 2294 −2387 −1461 590 −1960 −68 904 −67 −837 −1993 −2554 −1871 9600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  13(D) −2663 −4633 3700 580 −4789 −2487 −1872 −4738 731 −4578 −3963 −1073 −3046 −1551 −2987 −2292 −2742 −4201 −4759 −3709 9700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  14(C) 2503 3193 −4266 −3818 −2010 −3276 −2896 762 −3517 −1437 −1051 −3233 −3509 −3212 −3411 −2499 −1792 1507 −2796 −2431 9800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  15(D) −1363 −2905 2748 542 −3202 −2072 −920 −2977 290 −2912 −2023 1270 −2294 −489 −1186 53 1116 −2518 −3086 −2349 9900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  16(L) −1268 −1113 −3338 −540 −1057 −2827 −1716 569 −2409 2299 −236 −2381 −2862 −2089 −2316 −232 −1213 1306 −1645 −1304 10000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  17(S) −1350 −2877 588 1045 −3189 −496 −920 −2963 −628 −2901 −2011 1860 −2289 −489 −1184 2139 190 −2503 −3077 −2343 10100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −2336 −8139 −325 −894 −1115 −701 −1378 * *  18(G) −454 −832 −968 −1110 −2112 3143 −1211 −2091 −1317 −2264 −1691 −978 −1499 −1202 −1421 −646 −774 −1550 −1916 −1919 10200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −38 −5840 −6882 −894 −1115 −3098 −179 * *  19(H) −898 −1313 −545 −482 −320 −1336 4297 −1552 −160 −1493 −1035 −579 −1675 −363 −322 −934 −951 −1354 −725 107 10300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −38 −5840 −6882 −894 −1115 −3098 −179 * *  20(D) −872 −1812 3234 432 −2215 −967 −433 −2172 −569 −2269 −1704 99 −1453 −184 −1141 −728 −973 −1814 −2146 −1646 10400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −38 −5840 −6882 −894 −1115 −3098 −179 * *  21(E) −766 −1695 521 2831 −2050 −1029 −293 −1804 −118 −1919 −1331 69 −1441 −4 −527 −653 −814 −1512 −1988 −1505 10500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −38 −5840 −6882 −894 −1115 −3098 −179 * *  22(Y) −1337 −1229 −1681 −1596 1268 −1957 121 −918 −1294 −769 −585 −1229 −2163 −1111 −1301 −1443 −1359 −932 592 3932 10600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −38 −5840 −6882 −894 −1115 −109 −3775 * *  23(I) −2294 −1931 −4749 −4227 −1724 −4227 −3320 2306 −3952 1990 −634 −3878 94 −3538 −3812 −3411 −2247 1576 −2891 −2629 10700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  24(I) −2801 −2299 −5406 −5003 −2108 −5164 −4649 3051 −4886 1593 −869 −4829 −4788 −4454 −4829 −4493 −2764 1435 −3781 −3585 10800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  25(K) −234 −2632 306 −500 −3007 −2141 −719 −2712 2540 −2619 −1730 −778 −2231 2257 968 −1109 −1152 −2288 −2738 −2136 10900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  26(G) −2184 −3900 796 392 −4174 2903 −1580 −4030 −1636 −3937 −3173 −967 −2810 −1 −2362 1069 −2220 −3530 −4130 −3229 11000% — −149 −501 233 42 −375 399 104 −625 210 −463 −722 276 396 44 96 358 116 −371 −296 −251 — −155 −3318 −9181 −3674 −118 −701 −1378 * *  27(K) −3243 −3775 −4129 −2558 −4750 −3647 −1490 −4021 3681 −3617 −2982 −2368 −3580 −1076 1318 −3119 −2876 −3817 −3395 −3374 12600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  28(K) −1684 −2925 −1665 −979 −3407 −2535 −923 −3021 2737 −2865 −2032 202 −2582 1301 804 −1564 1681 −2645 −2905 −2448 12700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  29(V) −2623 −2122 −5300 −4990 −2769 −5101 −5131 2388 −4945 −1532 −1474 −4790 −4868 −4890 −5101 −4482 −2619 3219 −4505 −3990 12800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  30(A) 3309 −1828 −4057 −4294 −4382 656 −3657 −4147 −4169 −4428 −3497 −2821 −2904 −3694 −3937 −1470 59 −2957 −4610 −4522 12900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  31(V) −2625 −2122 −5304 −4993 −2772 −5111 −5142 2881 −4950 −1532 −1474 −4796 −4873 −4896 −5108 −4492 −2621 2896 −4512 −3997 13000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  32(I) −2790 −2287 −5403 −5009 −2155 −5170 −4698 3324 −4899 1175 −912 −4835 −4802 −4495 −4860 −4506 −2757 1192 −3838 −3622 13100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  33(G) −4435 −4203 −5092 −5462 −5893 3834 −5028 −6627 −5765 −6297 −5970 −5141 −4804 −5546 −5385 −4727 −4815 −5862 −4924 −5849 13200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  34(Y) −4838 −3766 −5229 −5579 1502 −5108 −1300 −3726 −5134 −3040 −3131 −3723 −4963 −3861 −4500 −4356 −4689 −3881 2986 4507 13300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  35(G) −4435 −4203 −5092 −5462 −5893 3834 −5028 −6627 −5765 −6297 −5970 −5141 −4804 −5546 −5385 −4727 −4815 −5862 −4924 −5849 13400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  36(S) −1473 −2007 −3647 −3780 −3430 −2363 −3314 228 −3616 −3373 −2876 −2840 −3093 −3395 −3541 3475 −1885 −2307 −3927 −3474 13500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  37(Q) −4589 −4392 −3927 −4146 −5099 −4221 −4099 −5973 −3840 −5564 −5304 −4230 −4693 4575 −3826 −4704 −4772 −5612 −4577 −4751 13600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  38(G) 677 −2128 −3838 −4171 −4647 3536 −3816 −4506 −4340 −4749 −3857 −3009 −3149 −3871 −4137 −1784 −2005 −3297 −4725 −4735 13700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  39(H) −2667 −3375 −2682 −2114 −3744 −3201 4738 −3782 −445 −3553 −2886 −2112 866 −1265 1506 −2614 −2557 −3469 −3282 −2908 13800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  40(A) 3631 −2768 −4492 −4815 −4888 −2992 −4271 −4781 −4818 −5025 −4365 −3727 −3728 −4477 −4545 −2567 −2762 −3852 −4724 −4942 13900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  41(H) −3103 −3404 −2950 −2573 −783 −3679 4549 −3407 −1372 −3071 −2715 −2454 −3764 2546 −1428 −2990 −2976 −3308 2269 −295 14000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  42(A) 3357 −1795 −4134 −4277 −4057 −2118 −3548 −3549 −4035 −4024 −3192 −2817 −2900 −3608 −3823 217 −1660 −276 −4363 −4211 14100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  43(Q) −1061 1950 −2044 −1475 −1236 −2372 −1154 −789 −1218 1062 1123 743 −2446 2895 −1441 −1392 −1005 −693 −1678 −1278 14200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  44(N) −4000 −4117 −3389 −3749 −5073 −3911 −4123 −6022 −4503 −5797 −5419 4397 −4479 −4255 −4592 −4115 −4312 −5371 −4650 −4731 14300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  45(L) −4414 −3800 −5638 −5628 −2290 −4980 −4628 −1886 −5423 3316 −1236 −5514 −4997 −4750 −5002 −5379 −4399 −2629 −3665 −3690 14400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  46(R) −1731 −3015 275 −931 −3487 −2518 −973 −3116 2321 −2955 −2123 224 −2603 256 2808 −1596 −1613 −2730 −2995 −2515 14500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  47(D) −2896 −4843 3855 944 −5037 −2600 −2082 −5082 −2528 −4903 −4373 −1209 −3196 −1786 −3536 −2501 −3007 −4517 −5004 −3956 14600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  48(S) −1536 −2212 −2363 −2679 −4293 −2279 −3082 −4365 −3331 −4524 −3676 288 −3026 −2967 −3497 3508 −1962 −3259 −4477 −4066 14700% — −148 −500 232 44 −381 398 105 −627 211 −465 −721 275 393 45 95 360 118 −370 −295 −250 — −155 −3318 −9181 −2405 −302 −701 −1378 * *  49(G) −2521 −3968 1232 −911 −4849 3373 −2126 −4854 −2535 −4752 −4136 −53 −3115 −1836 −3440 −2284 −2716 −4157 −4880 −3914 15400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  50(V) −2767 −2324 −5232 −4770 396 −4827 −3784 −36 −4546 848 −611 −4472 −4518 −3980 −4367 −4081 −2716 3323 −3037 −2660 15500% — −148 −500 233 43 −381 399 106 −626 211 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −148 −3381 −9181 −203 −2928 −701 −1378 * *  51(D) −1684 −3285 2735 2014 −3554 −2196 −1177 −3350 92 −3279 −2427 692 −2505 −770 −1595 −1483 −1666 332 −3460 −2676 15700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  52(V) −3122 −2888 −5092 −5160 −3522 −4180 −4687 −905 −5060 −2626 −2570 −4662 −4579 −4940 −4923 −4013 −3297 3796 −4414 −4190 15800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  53(V) 369 366 −3075 −2462 −883 −2557 −1420 1415 378 −757 −117 −2098 −2610 −1809 −2037 −1630 1166 2145 −1385 −343 15900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  54(V) −2624 −2122 −5302 −4991 −2772 −5108 −5139 2623 −4948 −1533 −1475 −4794 −4871 −4894 −5106 −4488 −2620 3088 −4511 −3996 16000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  55(G) 929 −2107 −3852 −4182 −4633 3492 −3809 −4486 −4335 −4732 −3835 −2997 −3132 −3863 −4127 −1761 −1982 −3275 −4720 −4725 16100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  56(L) −3427 −2938 −5791 −5325 −1449 −5374 −4410 −543 −5063 3041 −255 −5207 −4820 −4126 −4691 −4757 −3351 883 −3184 −3234 16200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  57(R) −3040 −3724 −3266 82 −4620 −3470 −1396 −3905 804 −3529 −2874 −2133 −3439 −978 3800 −2894 −2709 −3682 −3353 −3267 16300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  58(K) 31 −2412 −803 1532 −2743 −1920 −559 −2483 1772 −2421 −1503 −556 1229 727 1079 −566 −893 −2041 −2579 −1915 16400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  59(G) −2671 −4661 1614 587 −4832 3103 −1901 −4803 −2269 −4648 −4047 421 −3049 −1587 −3230 −2297 −2766 −4245 −4850 −3752 16500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  60(S) −1499 −2308 −1932 −1859 −4006 1604 −2121 −3754 1362 −3793 −2945 −1833 −2827 −1794 −1902 2738 −1771 −2970 −3910 −3479 16600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −247 −8139 −2699 −894 −1115 −701 −1378 * *  61(K) 1362 −2232 −619 −98 −2567 −427 −435 −2309 1599 −2265 −1349 1101 −1861 886 −512 833 −740 −1868 −2441 −1767 16700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −9 −7900 −8943 −894 −1115 −344 −2238 * *  62(S) −1288 −1904 −3742 −4011 −4384 −2155 −3593 −4209 −3996 −4479 −3573 −2789 −2948 −3606 −3832 3517 228 −3028 −4600 −4451 16800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  63(W) 726 −873 −3261 −2634 1926 −2567 −1425 660 −2252 −701 −68 −2174 −2617 −1898 18 −1648 −972 983 4091 −958 16900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  64(E) 1527 −2404 212 1636 −2722 −1878 −556 −2474 1241 −2419 −1497 350 −1985 −100 −659 96 70 −2025 −2589 −1903 17000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  65(K) −8 −2242 −895 770 −2502 −1963 −609 −2192 2589 22 −1353 −631 −2052 692 −617 −889 −906 −361 −2455 −1836 17100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  66(A) 3631 −2768 −4492 −4815 −4888 −2992 −4271 −4781 −4818 −5025 −4365 −3727 −3728 −4477 −4545 −2567 −2762 −3852 −4724 −4942 17200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  67(Q) −1006 −2441 −869 1767 −2780 −1965 −586 −2510 1702 −2445 −1534 −603 −2052 1923 873 −888 236 −630 −2596 −1949 17300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  68(A) 1489 −2393 167 1234 −2711 −1873 −547 −2462 895 −2408 −1485 1161 −1977 −90 −648 666 141 −2014 −2577 −1892 17400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  69(D) 2104 −2898 2124 985 −3163 −2096 1397 −2935 −693 −2897 −2025 −723 −2329 −543 −1250 −1245 −1368 −2501 −3087 −530 17500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  70(G) −2294 −2898 −2521 −2885 −4852 3641 −3456 −5042 −3796 −5094 −4356 365 −3545 −3376 −4005 −2451 −2700 −3996 −4706 −4575 17600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  71(F) −2596 −2266 −4685 −4188 3193 −4136 1018 505 −3812 1986 −405 −3595 −3961 −3157 −3524 −3277 −2509 −1337 −1621 −840 17700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  72(K) 47 −2348 338 950 −2668 −1854 −512 −507 1721 −2364 −1438 −490 −1947 672 436 806 687 −1970 −2533 −1851 17800% — −149 −500 232 46 −381 399 105 −627 210 −466 −721 277 393 45 95 359 119 −370 −295 −250 — −155 −3318 −9181 −2159 −366 −701 −1378 * *  73(V) −1810 −1639 −4149 −3689 −1869 −3417 −2822 29 −3369 320 −897 −3230 112 −3099 −3291 −2619 −767 3269 −2708 −2354 18400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  74(K) 847 −1093 −2131 −1554 304 127 −1127 −637 1445 645 1186 −1534 −2401 −1174 −1547 −764 −172 −528 −1519 1413 18500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  75(T) −1284 −2794 1526 1290 −3096 −2041 1289 −2863 −548 −2808 −1914 −668 −2242 −427 −1095 1451 1827 −2411 −2986 −2264 18600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  76(V) −1089 −957 −3143 −2535 −943 −2618 −1496 1052 −2198 −792 1859 −146 686 −1884 −2111 −1695 945 2346 −1458 −1106 18700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  77(W) 1606 −2321 −752 612 −2628 −323 −527 −2366 1480 −2331 −1416 −510 −789 −73 421 23 −829 −1936 2212 −1843 18800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  78(E) −1509 −3540 1372 3127 −3861 −120 −1391 −3685 −1319 −3605 −2787 −900 −2659 −1005 −1976 −400 −655 −3194 −3790 −2957 18900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  79(A) 3390 −1868 −4092 −4341 −4332 −2153 −3680 −3942 −4157 −4333 −3471 −2869 −2948 −3730 −3919 −1525 931 −2894 −4580 −4483 19000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  80(V) 2003 −1721 −4449 −3995 −2160 −3763 −3240 1342 −3745 −1435 −1124 −3561 −3855 −3494 −3700 −2979 −58 2574 −3091 −2698 19100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  81(K) 1714 −2501 −959 446 −2858 −2043 −654 −2574 1964 −2506 −1609 −689 −2135 −203 1088 428 −1032 −2148 −2652 −2027 19200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  82(W) 265 −2347 815 432 −2663 634 −519 −2410 619 −2361 −1438 −495 −1952 1955 −609 −382 147 −1966 2858 −1853 19300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  83(A) 3391 −1860 −3998 −4279 −4411 −2128 −3684 −4207 −4197 −4490 −3565 −2837 −2929 −3729 −3959 706 −1718 −3001 −4636 −4534 19400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  84(D) −2747 −4795 3813 396 −4912 −2496 −1935 −4905 −2324 −4735 −4166 −1079 −3082 603 −3296 −2353 −2844 −4347 −4929 −3809 19500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  85(V) −2717 −2220 −5338 −4951 −2254 −5099 −4670 1963 −4844 1553 −1011 −4759 −4771 −4509 −4836 −4427 −2688 2741 −3899 −3628 19600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  86(V) −2635 −2129 −5306 −4970 −2652 −5125 −5011 2554 −4915 −354 −1368 −4781 −4852 −4798 −5038 −4487 −2622 3019 −4355 −3902 19700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  87(M) −1340 −1208 −3317 −2708 −968 −2860 −1708 577 −2346 932 4131 −2382 −2878 250 −2265 −228 −1278 −506 −1629 −1313 19800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  88(I) −2566 −2177 −5017 −4470 669 −4496 −3487 2791 −4191 1116 1394 −4156 −4228 −3615 −3972 −3687 −2499 1692 −2860 −2711 19900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  89(L) −4414 −3800 −5638 −5628 −2290 −4980 −4628 −1886 −5423 3316 −1236 −5514 −4997 −4750 −5002 −5379 −4399 −2629 −3665 −3690 20000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  90(I) 1212 −1286 −3846 −3262 −1360 −3195 −2166 1616 −2918 1031 −493 −2824 −3211 −2583 −2782 −2308 1598 1299 −2020 −1668 20100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  91(P) −1614 −2214 −3396 −3710 −4516 −2407 −3618 −4516 −3976 −4705 −3849 −2890 3993 −3625 −3900 666 −2068 −3354 −4610 −4474 20200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  92(D) −4580 −4701 4174 −3014 −5700 −3967 −3905 −6376 −4478 −6024 −5744 −3355 −4501 −3870 −4926 −4440 −4750 −5894 −4922 −5231 20300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  93(E) −1123 −2199 −983 2715 −2589 −2046 −942 −2250 −625 −2356 1979 −870 −2250 −554 −1093 463 932 −1902 −2660 −2064 20400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  94(H) 399 −1137 −2012 −14 1582 −2306 1600 246 −1252 190 −325 −1456 −2374 1474 −1479 −94 −905 896 −1557 −1158 20500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  95(Q) −2742 −3142 −2766 −2681 −2790 −3344 −2460 −160 −1802 −2456 −2353 −2682 −3710 4317 −1866 −2894 −2844 −2559 −3295 −2711 20600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  96(A) 1981 −2315 −809 −268 −2645 −531 −579 −2374 232 −2350 −1445 −567 1217 711 445 447 −874 −1951 −2540 −1883 20700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  97(D) 491 −2351 1394 1381 −2671 −1854 1062 −2421 1010 −2367 −1440 −489 −1947 1017 362 −760 250 −623 −2535 −1852 20800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  98(V) −2039 −1706 −4456 −3939 −1846 −3939 −3049 1986 −3656 1460 −826 804 −3870 −3351 −3565 −3105 −2000 2330 −2796 −2442 20900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * *  99(Y) −4840 −3766 −5230 −5581 1898 −5109 −1300 −3727 −5135 −3041 −3132 −3723 −4964 −3861 −4501 −4357 −4690 −3883 3325 4377 21000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 100(E) −163 −2353 −734 1681 −2674 −1859 888 −2422 1668 −792 −1443 777 −1952 890 286 −766 238 −1975 −2536 −1856 21100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −257 −8139 −2649 −894 −1115 −701 −1378 * * 101(E) 1017 −2763 862 2042 −3060 −1913 −775 −2836 −495 −2773 −1886 1956 −2143 −136 −1056 265 −1185 −2377 −2948 −2207 21200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −9 −7891 −8933 −894 −1115 −338 −2261 * * 102(E) −944 −2422 863 2138 −2740 −436 −567 −2493 894 −2437 −1515 −518 −1994 1767 −673 109 −885 −1023 −2605 −1917 21300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 103(I) −2660 −2156 −5316 −4965 −2520 −5119 −4900 3165 −4894 297 −1251 −4775 −4828 −4705 −4975 −4470 −2642 2240 −4202 −3814 21400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 104(E) 1068 −2341 −760 2003 628 −1887 876 −2380 1240 −2347 −1436 −529 −1983 881 −618 −804 −855 −1954 −2530 −1862 21500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 105(P) −343 −3144 1561 442 −3538 −489 −1216 −3329 −1038 −3274 −2420 −848 2974 −812 −1635 469 −1644 −2849 −3462 −2693 21600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 106(N) −1173 −2375 −814 827 −2376 −2071 1767 −2279 −479 −2336 −1509 3151 −2218 −415 −957 −1093 −1120 −198 −2486 647 21700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 107(M) −3415 −2890 −5826 −5252 −1352 −5488 −4282 1361 −5022 2621 2728 −5181 −4778 −4005 −4613 −4776 −3292 69 −3071 −3194 21800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 108(K) −1941 −3098 −1997 −1232 −3650 −2740 −1025 −3210 3059 −3010 −2208 499 −2766 1457 1261 −1817 −90 −2858 −3002 −2622 21900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 109(P) 1129 −2426 −740 964 −2747 −1913 −589 −2491 1139 −2440 −1525 −552 1941 1446 −655 −480 −913 −2050 −2610 −1935 22000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 110(G) −2276 −2907 −2347 −2709 −4832 3554 −3349 −5005 −3678 −5053 −4315 1193 −3507 −3243 −3937 −2418 −2674 −3974 −4703 −4521 22100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 111(A) 1730 −2349 958 −198 −2661 −1868 −535 −2405 927 −2362 −1444 414 −1966 788 −630 790 −840 −303 −2540 −1863 22200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 112(T) 1350 −1149 −14 −1461 −1155 −2314 −1111 758 −1275 −1024 1167 −1475 −2388 −1111 −1501 334 1843 354 −1581 −1182 22300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 113(L) −3333 −2796 −5806 −5293 −1506 −5535 −4502 1096 −5103 2935 −282 −5232 −4857 −4172 −4762 −4864 −3236 506 −3264 −3351 22400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 114(A) 1769 −1525 158 −857 −1603 148 −891 −1181 −752 187 −712 −1040 −2228 660 −1135 −1111 −913 1305 −1913 −1442 22500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 115(F) −4110 −3437 −5436 −5431 4216 −5143 −2159 −1742 −5074 563 −1124 −4290 −4871 −3987 −4561 −4547 −4016 −2374 −1356 −292 22600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 116(A) 3091 −1829 −3998 −4219 −4413 119 −3637 −4216 −4134 −4469 −3523 −2798 −2896 −3656 −3927 1514 −1679 −2983 −4632 −4539 22700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 117(H) −5197 −4539 −4720 −5009 −4036 −4506 5435 −6314 −4911 −5786 −5667 −4954 −4960 −5011 −4732 −5391 −5395 −6022 −4063 −3641 22800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 118(G) −4435 −4203 −5092 −5462 −5893 3834 −5028 −6627 −5765 −6297 −5970 −5141 −4804 −5546 −5385 −4727 −4815 −5862 −4924 −5849 22900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 119(F) −4044 −3387 −5534 −5444 4093 −5246 −2370 −1514 −5107 1089 −868 −4443 −4880 −3998 −4592 −4639 −3934 −2200 −1536 −523 23000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 120(N) 885 −1899 −2020 −1781 −2956 −2135 −1925 −2602 −1809 3 −2052 3468 −2633 −1676 −2141 413 −1437 −2139 −3194 −2737 23100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 121(I) −2673 −2169 −5324 −4969 −2477 −5123 −4876 3293 −4893 358 −1211 −4780 −4824 −4681 −4961 −4472 −2653 1969 −4158 −3791 23200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 122(H) −3381 −3705 −3197 −3491 −4166 638 5216 −5496 −3798 −5304 −4811 −3481 −4185 −3770 −3879 −3508 −3702 −4793 −4170 −3759 23300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 123(Y) −4816 −3757 −5210 −5549 3410 −5097 2153 −3719 −5105 −3041 −3127 −3715 −4955 −3851 −4483 −4344 −4669 −3870 −547 3677 23400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 124(G) −1065 −2519 948 −272 −2820 1844 998 −2566 972 −284 −1622 1553 −2090 −229 −802 −938 −1011 −2133 −2708 −2021 23500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 125(Q) −412 −2285 −2466 −2186 −2068 −2877 −2019 −1589 −1588 1526 −1121 −2187 −3153 3585 −1718 −2137 −1964 −1719 −2789 −2414 23600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 126(I) −2254 −1916 −4813 −4439 −2466 −4221 −3932 3248 −4248 −1515 −1324 −4044 −4259 −4063 −4255 230 −2280 2003 −3673 −3237 23700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 127(K) −888 −2234 334 1172 −2504 −1881 −546 −93 1370 −300 −1337 465 −1974 655 −646 −794 −827 1255 −2448 −1798 23800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 128(P) 715 −1925 −3618 −3897 −4464 653 −3594 −4274 −4053 −4520 −3596 −2770 3775 −3593 −3911 −1550 −1770 −3067 −4647 −4548 23900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 129(P) 479 −2398 −1173 −637 −2915 −2106 −848 −2610 −289 −2586 −1713 −884 2238 1247 2195 51 −1147 −2184 −2757 −2174 24000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 130(A) 1787 −2663 1377 529 −2976 −1992 −762 −2736 1785 −2680 −1776 −623 −2161 −319 −936 297 −1120 −2285 −2853 −2146 24100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −2336 −8139 −325 −894 −1115 −701 −1378 * * 131(F) −1308 −1104 −2227 −2120 3516 −2093 −244 −196 −1891 64 66 −1626 −2278 −1503 −1798 −1617 −1350 −389 305 1335 24200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −38 −5840 −6882 −894 −1115 −3098 −179 * * 132(P) −603 −937 −997 −1058 −1832 −1041 −1092 −1737 −1074 −1874 −1416 −992 3539 −1065 −1192 −789 −866 −1383 −1765 −1661 24300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −38 −5840 −6882 −894 −1115 −3098 −179 * * 133(K) −804 −1483 −564 −230 −1920 −1335 −101 −1605 2889 −1630 −1021 −349 −1569 232 698 −786 −759 −1358 −1637 −1317 24400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −38 −5840 −6882 −894 −1115 −109 −3775 * * 134(D) −2405 −4159 3349 −651 −4260 −261 −1744 −4307 −1947 −4207 −3514 2151 −2936 −1416 −2754 −2102 −2471 −3802 −4324 637 24500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 135(I) −2047 −1713 −4504 −3983 −1821 −3943 −3061 2461 −3697 1581 −797 −3593 −3873 −3371 −3587 −342 −2009 1904 −2784 −2441 24600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 136(D) −2024 −3444 3495 −680 −3868 −2331 −1596 −44 −1632 −3675 −2915 685 −2782 −1248 −2305 478 −2088 −3196 −3911 −3098 24700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 137(V) −3122 −2888 −5092 −5160 −3522 −4180 −4687 −905 −5060 −2626 −2570 −4662 −4579 −4940 −4923 −4013 −3297 3796 −4414 −4190 24800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 138(I) −53 −875 −3230 −2609 1867 −393 −1422 2613 −2236 −723 −81 −2157 −2608 −1885 −2086 −1633 276 −271 −1325 844 24900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 139(M) 315 −2345 −4754 −4279 −1396 −4001 −3301 −697 −3877 816 4676 −3879 −3994 −3361 −3676 −3242 −2531 −1114 −2746 −2629 25000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 140(V) −2623 −2122 −5301 −4990 −2770 −5102 −5132 2415 −4945 −1532 −1474 −4791 −4869 −4890 −5102 −4483 −2619 3206 −4506 −3991 25100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 141(A) 3405 2528 −4529 −4796 −4340 −2257 −3851 −3901 −4447 −4351 −3532 −3057 −3052 −3976 −4112 −1643 −1844 −2929 −4572 −4519 25200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 142(P) −4853 −4392 −5213 −5573 −5853 −4408 −5077 −6679 −5780 −6281 −6067 −5357 4310 −5648 −5396 −5166 −5194 −6092 −4900 −5786 25300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 143(K) −4484 −4357 −4380 −3992 −5413 −4236 −3307 −5555 3994 −5171 −4707 −3921 −4535 −3079 −2169 −4529 −4408 −5264 −4403 −4729 25400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 144(G) 2167 −1833 −3963 −4199 −4430 2715 −3642 −4236 −4146 −4489 −3540 −2795 −2898 −3661 −3939 910 −1682 −2994 −4647 −4556 25500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 145(P) −2604 −2948 −4094 −4235 −3544 −3269 −3767 −3353 −3912 −3066 2095 −3659 4036 −3912 −3822 −2883 −2963 −3249 −4027 −3787 25600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 146(G) −4435 −4203 −5092 −5462 −5893 3834 −5028 −6627 −5765 −6297 −5970 −5141 −4804 −5546 −5385 −4727 −4815 −5862 −4924 −5849 25700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 147(H) −2569 −3440 −1867 −1702 −3820 −2996 4731 −3830 634 −3639 −2963 −1838 1551 −1305 −748 −2470 −2510 −3482 −3434 −2990 25800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 148(T) 194 −1498 −3255 −2899 −2240 −2226 −2291 −1754 −2652 1634 −1430 −2330 −2747 −2399 −2684 567 2687 −1484 −2682 −2351 25900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 149(V) −3122 −2888 −5092 −5160 −3522 −4180 −4687 −905 −5060 −2626 −2570 −4662 −4579 −4940 −4923 −4013 −3297 3796 −4414 −4190 26000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 150(R) −4845 −4446 −5107 −4682 −5507 −4412 −3791 −5946 −2789 −5502 −5118 −4521 −4754 −3672 4219 −4989 −4832 −5644 −4538 −4993 26100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 151(R) −962 −2395 −777 1012 −2721 76 1031 −2459 −142 −2413 −1501 −560 −2018 −128 2308 1224 −66 −2023 −2585 −1919 26200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 152(E) −902 −2032 −899 2078 −2228 −1934 −611 −1897 −259 −221 −1156 520 −2024 816 −736 −858 1303 −287 −2295 537 26300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 153(Y) −4820 −3765 −5219 −5565 3303 −5093 −1317 −3703 −5127 −3017 −3111 −3732 −4959 −3868 −4500 −4356 −4679 −3867 −565 4052 26400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 154(V) 129 −1901 −989 821 −2060 −1969 −654 −1704 498 −52 −1037 −703 −2057 695 −796 443 −344 1871 −2192 −1626 26500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 155(Q) 576 −2355 344 1156 −2675 −1856 −515 −508 1502 −2370 −1444 571 −1949 1878 419 −764 −822 −1976 −2538 −1856 26600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 156(G) −3239 −3889 516 −2361 −5355 3646 −3337 −5629 −3818 −5498 −4951 −2619 −3905 −3187 −4377 −3211 −3532 −4837 −4895 −4826 26700% — −149 −500 232 44 −381 399 105 −627 211 −466 −721 277 393 45 95 359 117 −368 −295 −250 — −155 −3318 −9181 −2159 −366 −701 −1378 * * 157(G) 753 −2516 −789 488 −2848 2300 −672 −2582 596 −2529 −1627 481 −2112 −224 471 −962 −1024 −2149 −2694 −2033 27300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 158(G) −52 −2212 −3792 −4133 −4698 3627 −3843 −4580 −4356 −4812 −3937 −3058 −3216 −3901 −4170 −1874 −2095 −3384 −4734 −4766 27400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 159(V) −2485 −2030 −5123 −4769 −2667 −4797 −4593 2349 −4661 −1545 −1424 −4502 −4648 −4554 −4752 −4115 825 2986 −4159 −3678 27500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 160(P) −2541 −3139 −2413 −2753 −4726 −2991 −3342 −5055 −3527 −5058 −4393 1199 4031 −3244 −3757 −2665 −2911 −4148 −4583 −4362 27600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 161(C) 1577 3078 1357 −656 −2664 −219 891 −2359 −617 −2434 −1576 −891 −2199 −545 −1093 872 −1043 −1946 −2701 −2102 27700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 162(L) −2140 −2404 −3995 −3997 −2053 −3121 −3283 −1687 −3689 3041 −1200 −3360 −3626 −3433 −3567 480 −2414 −1973 −3145 −2755 27800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 163(I) −2527 −2092 −5072 −4613 2047 −4674 −3911 2668 −4413 117 −841 −4323 −4439 −4023 −4320 −3916 −2488 2176 −3342 −3040 27900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 164(A) 3631 −2768 −4492 −4815 −4888 −2992 −4271 −4781 −4818 −5025 −4365 −3727 −3728 −4477 −4545 −2567 −2762 −3852 −4724 −4942 28000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 165(V) −2623 −2122 −5301 −4990 −2770 −5102 −5132 2426 −4946 −1532 −1474 −4791 −4869 −4891 −5102 −4483 −2619 3200 −4506 −3991 28100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 166(H) −495 −2631 903 −2051 722 −3242 3753 −2386 −2056 −2342 −1863 −2047 −3330 −1815 −2362 −2318 −2233 −2272 −981 3315 28200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 167(Q) −4589 −4392 −3927 −4146 −5099 −4221 −4099 −5973 −3840 −5564 −5304 −4230 −4693 4575 −3826 −4704 −4772 −5612 −4577 −4751 28300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 168(D) −2873 −4605 3943 −902 −4948 −2633 −2157 −5087 −2604 −4922 −4387 428 −3235 −1872 −3575 −2522 −3009 −4491 −4932 −3946 28400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 169(A) 1776 −1612 −1274 138 −1698 −2092 −816 −1295 150 −1526 −780 −943 1212 −538 −1013 −1056 −894 1275 −1968 635 28500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 170(S) −1545 −2420 1001 −1518 −4049 −2206 −2206 −3839 −2264 −3938 −3103 −1627 −2814 −1909 −2758 2666 2313 −3045 −4143 −3560 28600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 171(G) −2999 −3461 −2978 −3207 −5161 3669 −3454 −5283 15 −5188 −4565 −3174 −3946 −3312 −3140 −3128 −3317 −4492 −4622 −4749 28700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 172(N) −887 −2349 −736 911 −2668 −1860 −518 −2415 711 −2363 −1440 1880 −1954 436 799 671 1230 −539 −2534 −1855 28800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 173(A) 3631 −2768 −4492 −4815 −4888 −2992 −4271 −4781 −4818 −5025 −4365 −3727 −3728 −4477 −4545 −2567 −2762 −3852 −4724 −4942 28900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 174(K) −1368 −2597 −1358 −720 −2953 −2298 1933 −2603 1975 851 −1706 −958 −2360 859 1012 −1273 1094 −2245 −2690 −2165 29000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 175(D) −27 −2613 2320 1049 −2923 −1962 1973 −2684 544 −2624 −1712 1408 −2115 345 −869 −969 −1058 −2231 −2793 −2087 29100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 176(V) −1096 −938 −3279 −2658 −899 −2643 −1513 1265 1006 1388 −124 −2232 −2688 −1950 −2151 −1725 −311 1669 −1425 827 29200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 177(A) 3342 −1826 −4064 −4295 −4368 111 −3651 −4129 −4159 −4412 −3484 −2820 −2903 −3689 −3929 −1469 409 −2949 −4599 −4508 29300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 178(L) −4414 −3800 −5638 −5628 −2290 −4980 −4628 −1886 −5423 3316 −1236 −5514 −4997 −4750 −5002 −5379 −4399 −2629 −3665 −3690 29400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 179(S) 2216 −1831 −3961 −4157 −4409 656 −3608 −4213 −4076 −4462 −3514 −2782 −2892 −3613 −3895 2686 −1675 −2982 −4623 −4523 29500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 180(Y) −3634 −3050 −4918 −4872 36 −4597 −1405 223 −4437 −250 −1998 −3545 −4494 −3522 −4004 −3782 −3536 −2621 2928 4349 29600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 181(A) 3391 −1860 −3998 −4279 −4411 −2128 −3684 −4207 −4197 −4490 −3565 −2837 −2929 −3729 −3959 706 −1718 −3001 −4636 −4534 29700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 182(K) 370 307 113 −351 −2280 −1925 −615 324 1888 −2040 −1194 −632 −2022 −205 −736 1541 14 −1628 −2330 −1726 29800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 183(G) 2572 −2028 −3934 −4246 −4575 2752 −3783 −4406 −4316 −4661 −3751 −2958 −3070 −3837 −4092 −1679 −1898 −3191 −4701 −4686 29900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 184(I) −2178 −1808 −4630 −4153 −2094 −4190 −3417 3121 −3909 311 −1023 698 −4099 −3656 −3864 −3388 −2148 1742 −3147 −2761 30000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 185(G) −4435 −4203 −5092 −5462 −5893 3834 −5028 −6627 −5765 −6297 −5970 −5141 −4804 −5546 −5385 −4727 −4815 −5862 −4924 −5849 30100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 186(G) 1392 2751 −4353 −4536 −4308 2864 −3681 −4084 −4233 −4354 −3425 −2859 −2890 −3744 −3957 712 −1656 −2914 −4553 −4470 30200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 187(G) 855 −1822 −3738 −3769 −4188 2507 −3358 −3950 −3667 −4196 −3283 −2667 986 −3302 −3621 −1441 2334 −2867 −4408 −4236 30300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 188(R) −3706 −3692 −4490 −3846 1391 −4057 −2273 −3795 −1906 −3355 −3181 −3458 −4263 −2675 3948 −3768 −3671 −3813 −2293 −1328 30400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −155 −8139 −3345 −894 −1115 −701 −1378 * * 189(A) 2844 −1670 −3814 −3873 −4048 −1958 −3316 −3787 −3686 −4061 −3156 −2598 −2734 −3301 −3572 1088 1907 −2713 −4286 −4136 30500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −7992 −9034 −894 −1115 −1303 −750 * * 190(G) −4176 −3995 −4855 −5222 −5686 3828 −4823 −6386 −5533 −6087 −5741 −4896 −4606 −5312 −5178 −4461 −4560 −5613 −4754 −5635 30600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −7992 −9034 −894 −1115 −422 −1980 * * 191(V) −2496 −2036 −5139 −4788 −2680 −4825 −4637 2522 −4686 −1549 −1431 −4527 −4668 −4584 −4783 −4148 629 2919 −4191 −3706 30700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 192(I) −2760 −2307 −5270 −4785 1172 −4884 −3992 3346 −4576 662 −572 −4539 −4535 −4008 −4400 −4134 −2703 757 −3223 −3041 30800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 193(E) 454 −3086 −801 3279 −4125 −2346 −1868 −3919 −1868 −3932 −3156 −1291 1208 −1533 −2450 −1842 −2097 −3305 −4121 −3395 30900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 194(T) −2738 −3109 −4509 −4810 −4918 −3305 −4346 −4865 −4769 −5072 −4551 −3987 −3998 −4580 −4545 −2999 4033 −4113 −4684 −4915 31000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 195(T) −1323 −1975 −2766 −2978 −4207 −2152 −3105 −4004 −3295 −4229 −3354 134 −2901 −2988 −3387 −113 3742 −2969 −4405 −4119 31100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 196(F) −4110 −3437 −5436 −5431 4216 −5143 −2159 −1742 −5074 563 −1124 −4290 −4871 −3987 −4561 −4547 −4016 −2374 −1356 −292 31200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 197(K) −111 −2844 −1470 1220 −3294 −2415 −860 −2939 2448 −2798 −1945 −1056 −2475 767 2054 −1421 −1432 −2544 −2858 −2356 31300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 198(E) 545 −3735 1715 2880 −3981 −2308 −1442 −3818 −1408 −3725 −2924 −909 −2713 1281 −2087 −1777 −2041 −3331 −3909 −3046 31400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 199(E) −4574 −4665 −2714 3919 −5655 −3995 −3886 −6219 −4238 −5898 −5604 −3415 −4513 −3838 −4570 −4456 −4726 −5786 −4878 −5197 31500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 200(T) −1211 1331 −3446 −2962 −1399 −2495 −1930 −869 −2610 −1374 −769 −2403 −2815 −2309 −2526 −1685 3305 195 −1933 1430 31600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 201(E) −1941 −3222 −921 3293 −3618 −2473 −1316 −3186 916 −3225 −2465 −1147 −2749 −923 −1064 −1790 −1902 −171 −3398 −2802 31700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 202(T) −1286 −1898 −3764 −4016 −4329 −2157 −3572 −4120 −3959 −4408 −3517 −2789 −2947 −3588 −3797 697 3756 −2989 −4554 −4399 31800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 203(D) −4580 −4701 4174 −3014 −5700 −3967 −3905 −6376 −4478 −6024 −5744 −3355 −4501 −3870 −4926 −4440 −4750 −5894 −4922 −5231 31900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 204(L) −3705 −3122 −6060 −5527 −1359 −5814 −4569 1065 −5292 3069 −146 −5564 −4963 −4163 −4828 −5215 −3571 −1279 −3159 −3298 32000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 205(F) −3777 −3220 −5271 −5259 4268 −4892 −2120 417 −4916 −1143 −1314 −4142 −4753 −3956 −4473 −4270 −3740 −1899 −1349 −269 32100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 206(G) −4435 −4203 −5092 −5462 −5893 3834 −5028 −6627 −5765 −6297 −5970 −5141 −4804 −5546 −5385 −4727 −4815 −5862 −4924 −5849 32200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 207(E) −4574 −4665 −2714 3919 −5655 −3995 −3886 −6219 −4238 −5898 −5604 −3415 −4513 −3838 −4570 −4456 −4726 −5786 −4878 −5197 32300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 208(Q) −3157 −3746 −3170 −2450 −4497 −3515 −1763 −4161 −443 −3809 −3189 −2392 −3620 4200 1284 −3063 −2944 −3900 −3556 −3420 32400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 209(A) 2672 −1334 −3318 −2853 −1740 371 −2072 483 −2577 −1549 −928 −2359 −2798 −2295 −2567 −1629 191 932 −2245 −1899 32500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 210(V) −2620 −2125 −5293 −4983 −2756 −5076 −5100 1877 −4932 −1522 −1466 −4777 −4855 −4870 −5082 −4456 −2619 3416 −4480 −3969 32600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 211(L) −4414 −3800 −5638 −5628 −2290 −4980 −4628 −1886 −5423 3316 −1236 −5514 −4997 −4750 −5002 −5379 −4399 −2629 −3665 −3690 32700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 212(C) −2243 5044 −4840 −4445 −1998 −3905 −3598 −31 −4138 449 −930 −3902 −4040 −3778 −4010 −3184 −2306 1347 −3209 −2883 32800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 213(G) −4435 −4203 −5092 −5462 −5893 3834 −5028 −6627 −5765 −6297 −5970 −5141 −4804 −5546 −5385 −4727 −4815 −5862 −4924 −5849 32900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 214(G) 677 −2128 −3838 −4171 −4647 −3536 −3816 −4506 −4340 −4749 −3857 −3009 −3149 −3871 −4137 −1784 −2005 −3297 −4725 −4735 33000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 215(V) 378 724 −3707 −3104 −1180 −2986 −1919 1210 −2734 1302 −359 −2627 −3014 −2382 −2566 −2089 1123 1949 −1773 −1423 33100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 216(M) −948 −1407 −1515 156 −1452 −2164 1677 −1030 −821 −1302 1976 −1113 −2245 −718 −1173 773 1715 1332 −1794 −1343 33200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 217(E) 1397 −2528 −725 2286 −2932 240 −791 −2681 328 −2645 −1744 −674 −2162 −351 −939 545 −1095 −2227 −2828 −2143 33300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 218(L) −3705 −3122 −6060 −5527 −1359 −5814 −4569 1065 −5292 3069 −146 −5564 −4963 −4163 −4828 −5215 −3571 −1279 −3159 −3298 33400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 219(V) −2600 −2108 −5251 −4894 −2568 −5025 −4783 2479 −4810 −1354 1358 −4683 −4772 −4654 −4895 −4362 −2584 3018 −4181 −3758 33500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 220(K) −1633 −2905 −1573 706 −3375 −2487 −900 −3003 2925 −2849 −2008 −1128 −2541 1714 784 −1509 −105 −2617 −2894 −2418 33600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 221(A) 2352 2066 −2593 −2000 −947 −2434 −1271 −486 −32 −832 714 −1817 −2498 −1493 −1792 −1483 274 453 −1419 501 33700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 222(G) 224 −1905 −3562 −3696 −3684 3361 −3297 −3220 −3625 81 −2886 −2733 −2977 −3326 −3545 −1606 −1763 −2574 −4068 −3810 33800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 223(F) −4781 −3756 −5207 −5542 4341 −5070 −1342 −3653 −5111 −2971 −3065 −3743 −4949 −3874 −4496 −4351 −4650 −3829 −591 1725 33900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 224(E) −2413 −4114 221 3465 −4392 −2485 −1689 −4248 −1608 −4112 −3396 −1094 −2951 −1336 871 −2119 −2441 −3763 −4239 −3395 34000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 225(T) −1461 −1864 −3139 −2645 −2659 −2483 −2136 −1734 −1646 −2359 −1761 −2298 −2936 −1995 920 −1748 3354 967 −2989 −2654 34100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 226(L) −3831 −3266 −5314 −5148 −673 −5068 −2476 −1443 −4706 3059 −789 −4359 −4756 −3864 −4314 −4462 −3729 −2115 −1672 1736 34200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 227(V) −1819 −1960 −4426 −4359 −2977 −3037 −3800 −439 −4098 −2145 −1909 −3451 −3600 −3879 −4011 −2397 2510 2999 −3974 −3608 34300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 228(E) −2863 −4790 1397 3563 −4990 −2594 −2061 −5021 −2476 −4848 −4298 −1204 −3182 −1761 −3454 −2476 −2968 −4462 −4951 −3920 34400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 229(A) 2686 −1916 −1440 275 −2529 −292 −1240 −2176 −998 −2345 1183 −1184 −2355 −905 −1425 512 −1158 −1817 −2697 −2174 34500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 230(G) −4435 −4203 −5092 −5462 −5893 3834 −5028 −6627 −5765 −6297 −5970 −5141 −4804 −5546 −5385 −4727 −4815 −5862 −4924 −5849 34600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 231(Y) −4099 −3483 −4921 −5048 −109 −4705 −1565 −2914 −4494 −2334 2010 −3723 −4707 −3735 −4111 −4065 −4068 −3172 −847 4618 34700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 232(Q) 1711 −2410 −772 934 −2739 −1925 −604 −2477 −171 −2433 −1524 −574 −2035 2086 345 902 −923 −2042 −2608 −1941 34800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 233(P) −3403 −4071 −1922 817 −5220 −3359 −3173 −5423 −3337 −5281 −4771 −2564 4045 −2989 −3760 −3320 −3624 −4817 −4763 −4636 34900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 234(E) −2870 −4786 1265 3587 −4993 −2600 −2068 −5026 −2483 −4852 −4303 −1212 −3188 −1768 −3458 −2484 −2974 −4467 −4950 −3925 35000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 235(M) −3089 −2618 −5526 −4976 −1443 −5128 −4045 653 −4735 1429 4269 −4803 −4610 −3915 −4423 −4378 −2995 1140 −3054 −3074 35100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 236(A) 3631 −2768 −4492 −4815 −4888 −2992 −4271 −4781 −4818 −5025 −4365 −3727 −3728 −4477 −4545 −2567 −2762 −3852 −4724 −4942 35200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 237(Y) −4797 −3764 −5203 −5543 1114 −5069 −1339 −3694 −5111 −3013 −3107 −3741 −4951 −3876 −4497 −4354 −4666 −3859 −588 4723 35300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 238(F) −3828 −3605 −4146 −4086 4292 −4207 −2060 −3492 774 −3071 −3005 −3556 −4434 −3287 −2952 −3868 −3858 −3571 −1593 −494 35400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 239(E) −2775 −4471 −511 3582 −4815 −2610 −2057 −4863 −2317 −4711 −4124 1234 −3182 −1755 −3103 −2442 −2884 −4306 −4753 −3820 35500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 240(C) −1407 5023 −4397 −4323 −3016 −2468 −3398 −1251 −3952 −2540 −2082 −3044 −3133 −3588 −3744 −1803 1473 1125 −3677 −3390 35600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 241(L) −3370 −2847 −5795 −5233 −1386 −5465 −4298 708 −5010 2859 1349 −5155 −4777 −4026 −4622 −4755 −3254 814 −3103 −3213 35700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 242(H) −2519 −4224 −445 946 −4287 −2505 4583 −4377 −1764 −4237 −3571 2007 −3009 −1439 −2361 −2209 −2569 −3893 −4267 −3353 35800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 243(E) −3177 2571 −2701 3711 −4851 −3438 −3479 −4765 −3558 −4932 −4406 −3081 −4005 −3370 −3802 −3269 −3451 −4260 −4554 −4524 35900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 244(L) −85 −1333 −3893 −3280 −1111 −3185 −2083 1066 −2910 2310 1961 −2823 −3170 −2501 −2721 −2289 −113 436 −1859 −1558 36000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 245(K) −2513 −3173 −2941 −2370 −4402 −3094 −1824 −3895 3666 −3734 −3068 −2271 −3377 −1447 −616 −2537 751 −3485 −3625 −3471 36100% — −149 −500 233 43 −381 400 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −155 −3318 −9181 −196 −2974 −701 −1378 * * 246(L) −3571 −3023 −5954 −5375 −1321 −5646 −4390 −632 −5138 2962 1671 −5358 −4852 −4044 −4689 −4963 −3436 742 −3082 −3239 36300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 247(I) −2980 −2484 −5473 −5109 −1958 −5196 −4587 3728 −4915 267 −781 −4933 −4833 −4427 −4799 −4598 −2949 −64 −3627 −3397 36400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 248(V) −1685 −1668 −4095 −3732 −2081 −3082 −2893 −227 −3402 −1488 1383 −3123 −3419 −3145 −3320 367 −1807 3332 −2874 −2504 36500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 249(D) −2963 −4569 3864 −1039 −4953 −2751 −2187 −4998 767 −4822 −4260 −1424 −3314 −1891 −3072 −2624 −3060 −4467 −4770 −3962 36600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 250(L) −2768 −2715 −4842 −4633 −1675 −3998 −3790 −1038 −4207 3056 −562 −4150 −4179 −3740 −3989 −3399 699 −1545 −3154 −3067 36700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 251(M) −2822 −2356 −5342 −4861 −1759 −4985 −4151 2587 −4663 173 4005 −4649 −4601 −4076 −4487 −4251 −2764 766 −3321 −3210 36800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 252(Y) −4562 −3630 −5142 −5401 1516 −4992 −1300 −3544 −4968 −2963 −2986 −3671 −4868 −3786 −4393 381 −4432 −3662 2413 4375 36900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 253(E) −1959 −3457 −568 3135 −3841 −2347 −1410 −3622 −1165 −3547 −2751 −1000 −2716 1879 −1666 −1757 692 −3162 −3709 −2960 37000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 254(G) −347 −2818 −1215 201 −3253 2635 −921 −2921 1474 −2822 −1972 −1002 −2459 −486 658 −1397 −1435 −2521 −2923 −2378 37100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 255(G) −4435 −4203 −5092 −5462 −5893 3834 −5028 −6627 −5765 −6297 −5970 −5141 −4804 −5546 −5385 −4727 −4815 −5862 −4924 −5849 37200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 256(I) −2042 −1769 −4321 −3740 −1316 −3753 −2668 3134 −3389 1017 1999 194 −3653 −2958 −3221 −2884 −1980 −344 −2325 −2073 37300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 257(A) 1914 −1640 −1237 128 −1748 −661 −793 −1355 −577 −49 −817 −905 −2155 −498 −993 1037 162 −1149 −2002 624 37400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 258(N) 365 −3809 1001 557 −4083 1196 −1518 −3930 −1535 −3838 −3055 3219 −2763 −1148 −2243 −1845 −2131 −3433 −4027 −3144 37500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 259(M) −3656 −3159 −5816 −5350 −1349 −5421 −4248 −822 −4928 948 4920 −5248 −4838 −4039 −4539 −4860 −3558 −1557 −3044 −3030 37600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 260(R) −1614 −1949 −2260 −1663 −886 −2765 −1089 −1596 −1089 360 −1133 2239 −2814 −1215 2408 −1789 −1535 −1468 1995 1546 37700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 261(Y) −1548 −2973 568 −509 −2846 −2207 1172 −2986 441 −2941 −2110 1645 −2446 −659 −1264 −1389 −1509 −2582 −2924 3695 37800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 262(S) 279 −1844 −3877 −4131 −4448 136 −3634 −4260 −4132 −4511 −3561 −2782 −2903 −3648 −3936 3391 −1692 −3009 −4661 −4566 37900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 263(I) −2653 −2149 −5311 −4961 −2538 −5114 −4905 2957 −4891 332 −1267 −4770 −4827 −4713 −4978 −4466 −2636 2521 −4218 −3821 38000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 264(S) −2212 −2711 −4019 −4348 −4697 −2899 −4045 −4988 −4527 −5102 −4364 −3492 −3638 −4203 −4355 3681 −2664 −3902 −4616 −4605 38100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 265(N) −2725 −4778 2906 990 −4896 −2486 −1922 −4885 −2320 −4718 −4140 3045 −3069 −1612 −3311 −2334 −2821 −4325 −4919 −3794 38200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 266(T) −2061 −3396 −596 903 −4071 −2367 −1713 −3874 −1685 −3859 −3103 2125 −2850 −1369 −2277 −1897 3157 −3351 −4055 −3271 38300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 267(A) 3410 −2035 −3979 −4290 −4573 659 −3798 −4400 −4332 −4660 −3754 −2978 −3080 −3858 −4099 −1690 −1908 −3194 −4697 −4687 38400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 268(E) −2118 −3486 −1036 2964 −3935 −2588 −1284 −3596 1878 −3417 −2636 −1209 −2827 1323 −773 −1923 −2032 −3199 −3455 −2917 38500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 269(Y) −4524 −3618 −5100 −5310 1910 −4972 −1299 −3522 634 −2951 −2965 −3649 −4847 −3741 −4299 −4199 −4391 −3637 2997 4211 38600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −155 −8139 −3345 −894 −1115 −701 −1378 * * 270(G) −4176 −3995 −4855 −5222 −5686 3828 −4823 −6386 −5533 −6087 −5741 −4896 −4606 −5312 −5178 −4461 −4560 −5613 −4754 −5635 38700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −7992 −9034 −894 −1115 −422 −1980 * * 271(D) −2710 −4705 3025 1828 −4880 1758 −1932 −4863 −2320 −4703 −4115 −1084 −3073 −1621 −3297 −2330 −2809 −4301 −4894 −3793 38800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 272(Y) −2497 −2175 −4651 −4137 2447 −4046 −2215 255 −3766 892 1558 −3537 −3886 −3109 −3468 −3181 −2410 −1282 −1615 3508 38900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 273(V) −1425 −1250 −3480 −2894 −1283 −3035 −1955 691 −2570 −1 −429 −2568 −3060 942 −2514 −2129 1701 2578 −1907 −1553 39000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 274(T) 516 −1643 −1918 −1401 −2170 −2112 −1387 −1759 −1234 −2016 −1265 −1442 −2421 −1149 887 1341 2345 822 −2454 −2006 39100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 275(G) 677 −2128 −3838 −4171 −4647 3536 −3816 −4506 −4340 −4749 −3857 −3009 −3149 −3871 −4137 −1784 −2005 −3297 −4725 −4735 39200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 276(P) −992 −2210 343 −359 −2447 −1960 −675 −2143 533 −2204 −1351 −651 2813 −260 −802 465 −939 −873 −2467 1093 39300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 277(R) −1214 −2548 −1097 1072 175 −2145 −716 −2587 848 −2528 −1653 −795 −2228 −273 2862 417 −1133 −2191 −2671 −2084 39400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 278(V) 289 −2035 −5133 −4789 −2692 −4777 −4639 2142 −4689 −1561 −1443 −4511 −4649 −4585 −4784 −4102 −2487 3125 −4202 −3717 39500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 279(I) −2265 −1919 −4828 −4452 −2473 −4254 −3954 3155 −4265 −1516 −1326 −4066 −4279 −4082 −4274 226 −2288 2182 −3688 −3250 39600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 280(D) −1731 −3162 2329 −550 −3318 −2239 −1273 −3221 −1145 −3214 −2403 2295 −2573 −899 −1742 −1561 1851 −2804 −3366 1327 39700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 281(E) 1097 −2699 1227 2368 −2994 −2011 −796 −2753 381 −2704 −1808 −640 −2190 −358 −992 −1065 −1162 −2310 −2885 1152 39800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 282(E) −166 −2372 859 1835 −2692 −1861 1182 −2444 490 −2388 −1462 590 478 1356 −620 116 −837 −1994 −2555 −1871 39900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 283(T) 228 −1688 −3655 −3444 −3179 −2145 −2891 −2611 −3215 −3076 −2328 −2557 −2821 −2916 −3214 2251 2366 1397 −3549 −3270 40000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 284(K) −2991 −3623 −3848 −2331 −4472 −3512 −1356 −3763 2942 −3413 1860 −2188 −3430 −937 2705 −2874 −2650 −3556 −3267 −3189 40100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 285(E) 443 −2370 732 1690 −2691 −1863 −526 −2442 1639 −2385 −1460 −498 −1960 1120 437 106 −836 −1992 −2552 −1869 40200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 286(A) 1871 −2286 −843 814 −2570 −1928 −578 269 1096 −2279 −1391 −586 −2019 −136 1056 −62 −881 −1889 −2488 −1849 40300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 287(M) −3656 −3159 −5816 −5350 −1349 −5421 −4248 −822 −4928 948 4920 −5248 −4838 −4039 −4539 −4860 −3558 −1557 −3044 −3030 40400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 288(K) −1646 −2891 −1591 287 −3346 −526 −912 −2971 2831 −2832 −1997 −1146 −2554 −472 1762 −1527 −1524 −2597 −2885 1245 40500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 289(E) −172 −2394 367 2205 −2713 −487 −545 −2465 −134 −2409 −1485 1305 −1975 663 831 −795 72 −2015 −2577 −1891 40600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 290(C) 1574 3024 −4584 −4122 −2155 −3932 −3330 1746 −3870 −1406 −1109 −3691 −3957 −3613 −3805 −3144 −2046 2342 −3118 −2720 40700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 291(L) −187 −2175 −4307 −3889 −898 −3779 −2344 −944 −3485 2855 −476 −3390 −3782 −3025 −3298 −2972 −2345 −1269 −1846 1565 40800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 292(K) 862 −2347 143 1211 −2665 −1855 873 −2414 1692 −2362 917 −492 −1949 889 −603 −763 783 −1968 −2532 −1851 40900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 293(D) −2148 −3878 2790 1765 −4119 −2356 −1511 −3962 −1467 −3852 −3075 24 −2782 −1139 2142 −1879 −2163 −3473 −4024 −3155 41000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 294(I) −2630 −2131 −5302 −4991 −2737 −5092 −5106 3464 −4941 −1495 −1447 −4789 −4862 −4869 −5086 −4473 −2627 2071 −4467 −3968 41100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 295(Q) 346 −3134 −1818 −1401 −3862 −2760 −1314 −3433 1329 −3271 −2513 −1545 −2936 3817 −430 −2018 −2031 −3060 −3278 −2908 41200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 296(S) −1354 −2895 1712 354 −3192 −2068 −914 −2967 −621 −2903 −2012 1817 −2288 724 −1177 1978 −96 −2508 −3076 −2340 41300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 297(G) −4435 −4203 −5092 −5462 −5893 3834 −5028 −6627 −5765 −6297 −5970 −5141 −4804 −5546 −5385 −4727 −4815 −5862 −4924 −5849 41400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 298(E) −437 −2374 −769 2013 −2697 −1895 −552 −2438 623 −2389 −1472 −536 −1991 −97 777 829 1488 −1999 −2559 −1890 41500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 299(F) −4347 −3577 −4619 543 3858 −4820 −1320 −3438 −4609 −2900 −2894 −3532 −4750 −3628 −4209 −4078 −4237 −3546 −601 2917 41600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 300(A) 2827 −1603 −4068 −3628 −2047 −3165 −2823 1205 −3349 −1486 −1089 −3103 −3432 −3073 −3298 −2387 197 1100 −2812 −2447 41700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 301(K) −2364 −3363 −2464 163 −4038 −3041 −1188 −3501 2928 −3234 −2487 −1693 −3047 −758 2488 −458 −2152 −3194 −3159 −2895 41800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 302(M) −893 −2361 740 1780 −2680 −537 −524 −2429 930 −2376 1895 −498 −1958 −66 722 775 −833 −1982 −2545 −1864 41900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 303(W) −2965 −2553 −4795 −4482 3045 −4315 −1779 −1426 −4093 92 −987 −3564 −4179 −3330 −3743 −3475 −2878 664 4754 −84 42000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 304(I) −2621 −2136 −5246 −4859 −2364 −4987 −4577 3052 −4747 −250 1043 −4641 −4713 −4488 −4769 −4301 −2597 2384 −3934 −3596 42100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 305(L) 684 −1319 −1741 761 −1375 −2223 −1037 −927 −1042 1693 −533 −1287 −2325 −915 −1349 767 −152 84 −1756 −1329 42200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 306(E) 364 −4165 621 3314 −4393 −2398 −1686 −4282 −1836 −4169 −3446 728 −2893 −1339 −2626 −2045 −2402 −3767 −4362 −3401 42300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 307(N) −939 979 −1235 −681 −1738 1352 935 −1357 −549 −1572 −816 2186 −2155 −482 165 −1022 −880 30 −1990 1446 42400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 308(Q) 667 −2393 −773 511 −2721 −316 −544 −2465 1211 −2405 −1484 584 −1989 2135 1528 −812 −868 −2019 −2566 −1895 42500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 309(A) 2050 −1857 −1081 −526 −2013 −2012 188 −1645 −385 −1213 −1011 486 −2103 −346 1657 −953 306 −261 −2169 −1624 42600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 310(G) −1848 −2469 −2089 −2292 1262 2944 −2358 −3563 −2904 −3628 −3017 2347 −3167 −2550 −3185 −1986 −2162 −3006 −2814 −1874 42700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 311(Y) 475 1019 −1606 −1042 225 −2192 −935 −946 −891 −1226 1222 357 −2267 1002 1577 −1172 −888 −800 −1730 2446 42800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 312(P) −87 −2372 −1362 756 −3738 −2205 −2007 −3445 −1924 −3575 −2761 −1555 3598 −1697 −2362 −1566 286 −2803 −3832 −3277 42900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −2336 −8139 −325 −894 −1115 −701 −1378 * * 313(K) −804 −1483 −564 −230 −1920 −1335 −101 −1605 2889 −1630 −1021 −349 −1569 232 698 −786 −759 −1358 −1637 −1317 43000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −38 −5840 −6882 −894 −1115 −3098 −179 * * 314(E) −766 −1695 521 2831 −2050 −1029 −293 −1804 −118 −1919 −1331 69 −1441 −4 −527 −653 −814 −1512 −1988 −1505 43100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −38 −5840 −6882 −894 −1115 −109 −3775 * * 315(T) −942 −2382 −739 1086 −2714 151 −581 −2459 −171 −2415 −1499 414 −2004 −128 839 1365 1730 −2017 −2592 −1915 43200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 316(M) −2196 −1920 −4499 −3891 1726 −3822 −2504 −645 −3523 1973 3030 −3442 −3673 −2938 −3257 −2944 −2114 326 −2014 1662 43300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 317(H) −883 −2314 −747 517 −2618 −1863 1714 −647 1272 −2322 −1408 1011 472 −69 433 −772 1411 −299 −2507 −1836 43400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 318(A) 2474 −2397 −816 −367 −2797 −273 −722 −2529 555 −2507 −1610 592 −2110 837 −805 −138 −1006 −2092 −2699 −2039 43500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 319(M) −154 −986 −2485 −337 1024 −375 −1232 325 −444 867 1235 −1752 −2474 −1419 1020 −1455 670 −411 831 535 43600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 320(R) −1311 −2432 −1349 −724 −2724 −2272 −799 −2361 613 −644 1079 976 597 −382 2908 −1246 −1219 −2044 −2579 −2061 43700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 321(R) 897 −2364 −833 905 −2678 −1930 −568 −2405 1293 −2366 1485 −575 −2020 −177 2045 95 −893 −1984 −2543 −1892 43800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 322(N) 505 −2300 −750 523 −2598 121 −525 −594 485 95 −1395 1720 −1957 348 224 551 −821 −1910 −2497 −1828 43900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 323(E) 444 −2266 −766 1488 −2551 −1871 −533 −2276 889 −2266 1474 1478 −1963 682 −629 −781 12 −279 −2472 476 44000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 324(N) 1511 −1770 −728 −204 −2244 −1781 −426 282 601 −2121 −1133 1769 −1827 1398 447 −748 −766 −1713 −1779 −1595 44100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 325(N) 1053 −3109 1756 1735 −3404 −2143 −1074 −3191 −846 −3124 −2254 2158 −2417 −657 −1430 −1361 197 −2727 −3303 −2540 44200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 326(H) −2064 −3071 −1245 −1267 −3262 −2570 4711 −3611 −1060 −3528 −2812 −1479 −2961 1288 −1287 670 −2133 −3161 −3310 −2601 44300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 327(Q) −891 −2294 332 948 −2585 −739 −537 −2316 −131 −138 −1391 −518 1404 2021 −634 −785 619 −561 −2495 −1830 44400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 328(I) −1632 −1661 −2846 −86 −1626 −2983 −1663 3240 −1327 −191 −722 −2160 −3016 −1615 822 −2097 −1556 −560 −2157 −1805 44500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 329(E) −2734 −3605 −1382 3593 −3624 −2986 −2317 −3317 −2175 −3167 1983 −1898 −3440 −2054 −2556 −2649 −2820 −3234 −3920 −3370 44600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −2336 −8139 −325 −894 −1115 −701 −1378 * * 330(W) −1530 −1265 −2068 −1964 479 −1810 −483 −1181 −1470 −968 −802 −1648 −2104 −1454 −1405 −1757 −1583 −1218 5462 838 44700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −38 −5840 −6882 −894 −1115 −109 −3775 * * 331(K) 8 −2067 −905 437 −2275 −1941 −611 −307 2031 −2031 −1189 −636 −2030 1425 −709 −864 −350 1337 −2323 −1722 44800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 332(V) −2445 −2012 −5067 −4708 −2628 −4682 −4459 1586 −4580 −1533 −1402 −4414 −4575 −4456 −4653 −3990 1117 3227 −4065 −3597 44900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 333(G) −4435 −4203 −5092 −5462 −5893 3834 −5028 −6627 −5765 −6297 −5970 −5141 −4804 −5546 −5385 −4727 −4815 −5862 −4924 −5849 45000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 334(E) 1477 −2744 −762 2410 −3114 −2113 −884 −2850 −445 −2792 −1912 619 −2297 −451 1346 −1191 −1280 −2412 −2952 −2288 45100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 335(K) −1204 −2643 366 1309 −2998 −2086 −724 −2722 2626 −2637 −1741 −718 −2200 1198 862 −1073 −1133 −2287 −2770 −2133 45200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 336(L) −3571 −3023 −5954 −5375 −1321 −5646 −4390 −632 −5138 2962 1671 −5358 −4852 −4044 −4689 −4963 −3436 742 −3082 −3239 45300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 337(R) −4845 −4446 −5107 −4682 −5507 −4412 −3791 −5946 −2789 −5502 −5118 −4521 −4754 −3672 4219 −4989 −4832 −5644 −4538 −4993 45400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 338(E) 943 −2422 1002 1200 −2741 377 −572 −2493 982 −2439 −1517 −522 −1998 −117 −681 1129 −534 −2044 −2609 −1921 45500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 339(M) −3391 −2886 −5774 −5202 −1338 −5407 −4210 −576 −4943 1721 4369 −5109 −4742 −3963 −4548 −4689 −3273 771 −3038 −3137 45600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 340(M) −1812 −1601 −3997 −3375 696 −3401 −2222 −516 −2983 441 4360 −2991 −3334 −2559 641 −2503 −1740 404 −1934 −1661 45700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8139 −9181 −894 −1115 −701 −1378 * * 341(P) 102 −1789 −1729 −1313 428 −2112 −1410 −2021 −1236 −2235 −1470 −1394 3205 695 −1607 703 −1207 −1700 −2613 −2121 45800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −259 −8139 −2637 −894 −1115 −701 −1378 * * 342(W) −3486 −3022 −4312 −4121 1891 −4228 −1173 −2749 310 −2389 −2250 −3147 −4206 −2971 −3005 −3484 −3396 −2818 5644 611 45900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −239 −7889 −2749 −894 −1115 −1590 −583 * * 343(I) −2220 −1737 −4860 −4531 −2271 −4617 −4497 3348 −4448 −1059 −1008 −4311 −4407 −4340 −4559 −3974 −2216 2150 −3915 −3445 46000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −114 −7660 −3820 −894 −1115 −1149 −865 * * 344(A) 1699 −2218 532 −33 −2555 −553 −413 −2304 1212 −2260 −1348 582 −1822 37 −536 966 −724 −1859 −2439 −1755 46100% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −10 −7753 −8795 −894 −1115 −897 −1111 * * 345(A) 1523 −2068 −769 −231 −2383 1040 −522 −2084 928 −2120 −1245 −517 −1922 1335 −611 251 −768 −123 −2361 −1732 46200% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −9 −7949 −8991 −894 −1115 −1432 −668 * * 346(N) −1650 −3264 1760 −348 −3555 −230 −1131 −3362 324 −3285 −2448 2847 1624 −733 −1607 −1438 −1645 −2887 −3466 −2662 46300% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −193 −7842 −3049 −894 −1115 −1432 −668 * * 347(K) 150 −2932 −2433 −1483 −3710 −2747 −907 −3141 3369 −2897 −2178 −1487 −2774 −488 1175 −1994 −1888 −2848 −2822 −2610 46400% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −11 −7660 −8702 −894 −1115 −1824 −479 * * 348(L) −740 −922 −1768 154 −921 −2070 −829 1384 247 1472 −100 −1202 −2134 −805 485 −1085 −677 471 −1340 −944 46500% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −11 −7660 −8702 −894 −1115 −943 −1059 * * 349(V) 138 −1046 −3186 −2599 −1089 −2803 −1711 589 645 945 −236 −2305 −2830 −2012 −2236 −1892 −1154 2537 −1701 −1344 46600% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −9 −7842 −8885 −894 −1115 −380 −2109 * * 350(D) −2086 −3722 2888 1158 −4001 1601 −1510 −3811 −1573 −3773 −3018 −904 −2733 −1154 −2294 −1833 −2125 575 −3993 −3117 46700% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8046 −9088 −894 −1115 −701 −1378 * * 351(K) −78 −2308 398 −137 −2626 −483 542 −2374 2441 −2323 −1400 −447 531 720 −562 −724 290 −1929 −2493 −1812 46800% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −8 −8046 −9088 −894 −1115 −701 −1378 * * 352(D) 898 −1911 1604 −335 −2089 −1892 −573 −1746 489 −144 811 −609 34 −182 −708 541 −74 −281 −2188 −1605 46900% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −10 −7745 −8787 −894 −1115 −701 −1378 * * 353(K) −1676 −2544 −1956 −1135 −2823 −2531 −800 −2469 2955 −2426 −1683 −1240 −2548 −407 1469 −1628 −1517 −119 −2497 1619 47000% — −149 −500 233 43 −381 399 106 −626 210 −466 −720 275 394 45 96 359 117 −369 −294 −249 — −11 −7649 −8691 −894 −1115 −701 −1378 * * 354(N) −1074 −1925 −1092 −1190 −3523 −1781 −1760 −3345 −1701 −3432 −2589 3429 1327 −1460 −2119 1182 −1362 −2558 −3601 −3046 47100% — * * * * * * * * * * * * * * * * * * * * — * * * * * * * * 0 

What is claimed is:
 1. A mutant ketol-acid reductoisomerase enzyme comprising the amino acid sequence as set forth in SEQ ID NO:
 29. 2. A nucleic acid molecule encoding the mutant ketol-acid reductoisomerase enzyme of claim
 1. 3. A nucleic acid molecule encoding a mutant ketol-acid reductoisomerase enzyme having the amino acid sequence as set forth in SEQ ID NO:19.
 4. A mutant ketol-acid reductoisomerase enzyme as set for in SEQ ID NO:19
 5. A recombinant cell comprising the mutant ketol-acid reductoisomerase enzyme of claim
 1. 6. A mutant ketol-acid reductoisomerase enzyme as set forth in SEQ ID NO:17 comprising at least one mutation at a residue selected from the group consisting of 24, 33, 47, 50, 52, 53, 61, 80, 115, 156, 165, and
 170. 7. A mutant ketol-acid reductoisomerase enzyme according to claim 6 wherein: a) the residue at position 47 has an amino acid substation selected from the group consisting of A, C, D, F, G, I, L, N, P, H, T, E and Y; b) the residue at position 50 has an amino acid substitution selected from the group consisting of A, C, D, E, F, G, M, N, V, W and I; c) the residue at position 52 has an amino acid substitution selected from the group consisting of A, C, D, G, H, N, Y, and S; d) the residue at position 53 has an amino acid substitution selected from the group consisting of A, H, I, W, Y, C, and R; e) the residue at position 156 has an amino acid substitution of V; f) the residue at position 165 has an amino acid substitution of M; g) the residue at position 61 has an amino acid substitution of F; h) the residue at position 170 has an amino acid substitution of A; i) the residue at position 24 has an amino acid substitution of F; j) the residue at position 33 has an amino acid substitution of L; k) the residue at position 80 has an amino acid substitution of I; and l) the residue at position 115 has an amino acid substitution of L.
 8. A nucleic acid molecule encoding the mutant ketol-acid reductoisomerase enzyme of claim
 6. 9. A method for the evolution of an NADPH binding ketol-acid reductoisomerase enzyme to an NADH using form comprising: a) providing a ketol-acid reductoisomerase enzyme which uses NADPH having a specific native amino acid sequence; b) identifying the cofactor switching residues in the enzyme of (a) based on the amino acid sequence of the Pseudomonas fluorescens ketol-acid reductoisomerase enzyme as set for the in SEQ ID NO:17 wherein the cofactor switching residues are at positions selected from the group consisting of: 24, 33, 47, 50, 52, 53, 61, 80, 115, 156,165, and 170; and c) creating mutations in at least one of the cofactor switching residues of (b) to create a mutant enzyme wherein said mutant enzyme binds NADH.
 10. The method of claim 9 wherein: a) the residue at position 47 has an amino acid substitution selected from the group consisting of A, C, D, F, G, I, L, N, P, H, T, E and Y; b) the residue at position 50 has an amino acid substitution selected from the group consisting of A, C, D, E, F, G, M, N, V, W and I; c) the residue at position 52 has an amino acid substitution selected from the group consisting of A, C, D, G, H, N, Y, and S; d) the residue at position 53 has an amino acid substitution selected from the group consisting of A, H, I, W, Y, G, and R; e) the residue at position 156 has an amino acid substitution of V; f) the residue at position 165 has an amino acid substitution of M; g) the residue at position 61 has an amino acid substitution of F; h) the residue at position 170 has an amino acid substitution of A; i) the residue at position 24 has an amino acid substitution of F; j) the residue at position 33 has an amino acid substitution of L; k) the residue at position 80 has an amino acid substitution of I; and l) the residue at position 115 has an amino acid substitution of L.
 11. The method of claim 9 wherein the ketol-acid reductoisomerase enzyme has the amino acid sequence as set forth in SEQ ID NO:
 29. 12. A method for the production of isobutanol comprising: a) providing a recombinant microbial host cell comprising the following genetic constructs: i) at least one genetic construct encoding an acetolactate synthase enzyme for the conversion of pyruvate to acetolactate; ii) at least one genetic construct encoding a ketol-acid reductoisomerase enzyme of either of claims 1 or 6; iii) at least one genetic construct encoding an acetohydroxy acid dehydratase for the conversion of 2,3-dihydroxyisovalerate to α-ketoisovalerate, (pathway step c); iv) at least one genetic construct encoding a branched-chain keto acid decarboxylase, of the conversion of α-ketoisovalerate to isobutyraldehyde, (pathway step d); v) at least one genetic construct encoding a branched-chain alcohol dehydrogenase for the conversion of isobutyraldehyde to isobutanol (pathway step e); and b) growing the host cell of (a) under conditions where isobutanol is produced.
 13. A method for the evolution and identification of an NADPH binding ketol-acid reductoisomerase enzyme to an NADH using form comprising: a) providing a ketol-acid reductoisomerase enzyme which uses NADPH having a specific native amino acid sequence; b) identifying the amino acid residues in the native amino acid sequence whose side chains are in close proximity to the adenosyl 2′-phosphate of NADPH as mutagenesis targets; c) creating a library of mutant ketol-acid reductoisomerase enzymes from the class I ketol-acid reductoisomerase enzyme of step (a), having at least one mutation in at least one of the mutagenesis target sites of step (b); and d) screening the library of mutant ketol-acid reductoisomerase enzymes of step (c) to identify NADH binding mutant of ketol-acid reductoisomerase enzyme.
 14. A mutant ketol-acid reductoisomerase enzyme having the amino acid sequence selected from the group consisting of SEQ ID NO: 24, 25, 26, 27, 28, 67, 68, 70, 75, 79, 80, 81 and
 82. 15. A method for evolution of an NADPH specific ketol-acid reductoisomerase enzyme to an NADH using form comprising: a) providing a mutant enzyme having an amino acid sequence selected from the group consisting of SEQ ID NOs: 28, 67, 68, 69, 70, and 84; b) constructing a site-saturation library targeting amino acid positions 47, 50, 52 and 53 of the mutant enzyme of (a); and c) screening the site-saturation library of (b) to identify mutants which accept NADH instead of NADPH as cofactor.
 16. A method for evolution of an NADPH specific ketol-acid reductoisomerase enzyme to an NADH using form comprising: a) providing a DNA fragment encoding a mutant enzyme having an amino acid sequence selected from the group consisting of SEQ ID NOs: 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, and 98 containing mutations in cofactor specificity domain; b) producing a DNA fragment cofactor specificity domain of (a); c) providing a DNA fragment encoding a mutant enzyme having mutations in cofactor binding affinity domain selected from the group consisting of SEQ ID NOs: 28, 67, 68, 69, 70, 84 and 86; d) incorporating mutations of step (b) into mutants of step (c); and e) screening mutants of step (d) for mutant enzymes having a ratio of NADH/NADPH utilization is greater than one.
 16. The method of claim 15 wherein the K_(M) for NADH is less than 15 μM.
 17. A mutant ketol-acid reductoisomerase enzyme having an amino acid sequence selected from the group consisting of SEQ ID NOS: 75, 76, 77 and
 78. 18. A mutant ketol-acid reductoisomerase enzyme having an amino acid sequence selected from the group consisting of SEQ ID NOS: 79, 80, 81, 82, and
 83. 